533 lines
18 KiB
C++
533 lines
18 KiB
C++
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//+============================================================================
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//
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// File: dllmain.cxx
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//
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// Purpose: This file provides the registration and deregistration
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// functions for the IProp DLL: DllRegisterServer and
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// DllUnregisterServer. These two functions register/
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// deregister the property set marshaling code:
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// IPropertySetStorage, IPropertyStorage, IEnumSTATPROPSETSTG,
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// and IEnumSTATPROPSTG. Note that this registration is
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// different from the typical server registration in that
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// it only registers the marshaling code, it does not
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// register an instantiable COM server. Also, no registration
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// takes place if OLE32 is already registered to perform
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// this marshaling.
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//
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// The actual DllRegisterServer and DllUnregisterServer
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// implementations are at the end of this file. First,
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// several helper functions are defined.
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//
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//+============================================================================
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// --------
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// Includes
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// --------
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#include <pch.cxx>
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#include <tchar.h>
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// The following is from "olectl.h". That file couldn't simply
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// be included, however, because it isn't compatible with the
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// special objidl.h and wtypes.h used by IProp DLL.
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#define SELFREG_E_FIRST MAKE_SCODE(SEVERITY_ERROR, FACILITY_ITF, 0x0200)
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#define SELFREG_E_LAST MAKE_SCODE(SEVERITY_ERROR, FACILITY_ITF, 0x020F)
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#define SELFREG_S_FIRST MAKE_SCODE(SEVERITY_SUCCESS, FACILITY_ITF, 0x0200)
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#define SELFREG_S_LAST MAKE_SCODE(SEVERITY_SUCCESS, FACILITY_ITF, 0x020F)
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#define SELFREG_E_TYPELIB (SELFREG_E_FIRST+0)
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#define SELFREG_E_CLASS (SELFREG_E_FIRST+1)
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// -------
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// Globals
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// -------
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// Important DLL names.
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const LPTSTR tszNameDll = TEXT( "IProp.dll" );
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// Registry entry descriptions
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const LPTSTR tszOle32PSFactoryClsid = TEXT( "{00000320-0000-0000-C000-000000000046}" );
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const LPTSTR tszNamePropertySetStorage = TEXT( "IPropertySetStorage" );
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const LPTSTR tszNamePropertyStorage = TEXT( "IPropertyStorage" );
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const LPTSTR tszNameIEnumSTATPROPSETSTG = TEXT( "IEnumSTATPROPSETSTG" );
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const LPTSTR tszNameIEnumSTATPROPSTG = TEXT( "IEnumSTATPROPSTG" );
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// GUIDs in Registry format
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const LPTSTR tszGuidPropertySetStorage = TEXT( "{0000013A-0000-0000-C000-000000000046}" );
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const LPTSTR tszGuidPropertyStorage = TEXT( "{00000138-0000-0000-C000-000000000046}" );
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const LPTSTR tszGuidIEnumSTATPROPSETSTG = TEXT( "{0000013B-0000-0000-C000-000000000046}" );
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const LPTSTR tszGuidIEnumSTATPROPSTG = TEXT( "{00000139-0000-0000-C000-000000000046}" );
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//+----------------------------------------------------------------------------
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//
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// Function: UpdateKeyAndSubKey
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//
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// Synopsis: This function either creates or deletes first
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// a key and un-named value under HKEY_CLASSES_ROOT,
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// then a sub-key and associated un-named value. The
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// caller indicates whether a create or delete should occur.
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//
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// However, the caller may specify that nothing be done
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// if the sub-key exists and already has a specific
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// un-named REG_SZ value.
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//
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// Inputs: [const LPTSTR] tszMainKey (in)
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// The name of the key under HKEY_CLASSES_ROOT.
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// [const LPTSTR] tszMainKeyDescription (in)
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// The un-named REG_SZ value under this key (not necessary
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// if fDelete is true).
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// [const LPTSTR] tszSubKey (in)
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// The name of the key under the first key.
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// [const LPTSTR] tszSubKeyDescription (in)
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// The un-named REG_SZ value to write under this sub-key
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// (not necessary if fDelete is true).
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// [const LPTSTR] tszSubKeyCheck (in)
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// If non-NULL, and the subkey already exists, see if
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// this string matches an un-named REG_SZ value in
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// the sub-key. If so, abort the operation and return
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// ERROR_ALREADY_EXISTS.
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// [BOOL] fDelete
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// If TRUE, delete the keys, if FALSE, create them.
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// But this is ignored if tszSubKeyCheck matches
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// (in which case nothing happens).
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//
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// Returns: [long] A GetLastError value.
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//
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//+----------------------------------------------------------------------------
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long
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UpdateKeyAndSubKey( const LPTSTR tszMainKey,
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const LPTSTR tszMainKeyDescription,
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const LPTSTR tszSubKey,
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const LPTSTR tszSubKeyDescription,
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const LPTSTR tszSubKeyCheck,
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BOOL fDelete )
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{
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// ------
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// Locals
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// ------
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long lResult = ERROR_SUCCESS;
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DWORD dwDisposition;
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HKEY hkeyMain = NULL; // E.g. "HKEY_CLASSES_ROOT\\CLSID\\{.....}"
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HKEY hkeySub = NULL; // E.g. ..."InProcServer32"
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// -------------
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// Open the keys
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// -------------
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// Are we opening for delete?
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if( fDelete )
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{
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// Yes - we're deleting. We'll just attempt to do an Open.
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dwDisposition = REG_OPENED_EXISTING_KEY;
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lResult = RegOpenKeyEx( HKEY_CLASSES_ROOT,
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tszMainKey,
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0L,
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KEY_ALL_ACCESS,
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&hkeyMain );
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if( ERROR_SUCCESS == lResult )
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{
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lResult = RegOpenKeyEx( hkeyMain,
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tszSubKey,
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0L,
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KEY_ALL_ACCESS,
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&hkeySub );
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}
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if( ERROR_FILE_NOT_FOUND == lResult )
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lResult = ERROR_SUCCESS;
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else if( ERROR_SUCCESS != lResult )
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goto Exit;
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} // if( fDelete )
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else
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{
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// We're not opening for delete. So we'll use RegCreateKey,
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// which does an Open if the key exists, and a Create otherwise.
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lResult = RegCreateKeyEx( HKEY_CLASSES_ROOT,
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tszMainKey,
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0L,
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NULL,
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0,
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KEY_ALL_ACCESS,
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NULL,
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&hkeyMain,
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&dwDisposition );
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if( lResult != ERROR_SUCCESS ) goto Exit;
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// Open the sub-key.
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lResult = RegCreateKeyEx( hkeyMain,
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tszSubKey,
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0L,
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NULL,
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0,
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KEY_ALL_ACCESS,
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NULL,
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&hkeySub,
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&dwDisposition );
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if( ERROR_SUCCESS != lResult ) goto Exit;
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} // if( fDelete ) ... else
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// --------------------------
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// Do we need to do anything?
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// --------------------------
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// Does it look like we might not need to do anything?
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if( NULL != tszSubKeyCheck // The caller said to check first
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&&
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NULL != hkeySub // We Created or Opened a sub-key
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&& // Specifically, it was an Open.
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REG_OPENED_EXISTING_KEY == dwDisposition )
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{
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// Yes - we need to see if the key already contains
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// tszSubKeyCheck. If so, then we're done.
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DWORD dwType = 0;
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TCHAR tszData[ MAX_PATH ];
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DWORD dwDataSize = sizeof( tszData );
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// Is there an un-named value in this key?
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lResult = RegQueryValueEx( hkeySub,
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NULL, // Name
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NULL, // Reserved
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&dwType, // E.g. REG_SZ
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(LPBYTE) tszData,// Return value
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&dwDataSize ); // In: size of buf. Out: size of value
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// We should have gotten a success-code or a not-extant code
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if( ERROR_SUCCESS != lResult
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&&
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ERROR_FILE_NOT_FOUND != lResult )
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{
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goto Exit;
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}
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// If we got an extant SZ value that matches tszSubKeyCheck,
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// then there's nothing we need do.
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if( ERROR_SUCCESS == lResult
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&&
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REG_SZ == dwType
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&&
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!_tcsicmp( tszData, tszSubKeyCheck )
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)
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{
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lResult = ERROR_ALREADY_EXISTS;
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goto Exit;
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}
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} // if( REG_OPENED_EXISTING_KEY == dwDisposition ...
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// --------------------------
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// Delete keys, or set values
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// --------------------------
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if( fDelete )
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{
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// Reset the result code, since the code below may not set it.
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lResult = ERROR_SUCCESS;
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// We're doing a delete. First, delete the sub-key, which
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// will delete any values. If there was no subkey, hkeySub will
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// be NULL.
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if( NULL != hkeySub )
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{
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CloseHandle( hkeySub );
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hkeySub = NULL;
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lResult = RegDeleteKey( hkeyMain,
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tszSubKey );
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if( ERROR_SUCCESS != lResult ) goto Exit;
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}
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// Second, delete the main key
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if( NULL != hkeyMain )
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{
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CloseHandle( hkeyMain );
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hkeyMain = NULL;
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lResult = RegDeleteKey( HKEY_CLASSES_ROOT,
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tszMainKey );
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if( ERROR_SUCCESS != lResult ) goto Exit;
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}
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} // if( fDelete )
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else
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{
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// We're adding to the Registry. The two keys are now
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// created & opened, so we can add the REG_SZ values.
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// The REG_SZ value for the main key.
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lResult = RegSetValueEx(hkeyMain,
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NULL,
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0L,
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REG_SZ,
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(const BYTE *) tszMainKeyDescription,
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sizeof(TCHAR) * (1 + _tcslen(tszMainKeyDescription) ));
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if( ERROR_SUCCESS != lResult ) goto Exit;
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// The REG_SZ value for the sub-key.
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lResult = RegSetValueEx(hkeySub,
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NULL, 0L,
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REG_SZ,
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(const BYTE *) tszSubKeyDescription,
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sizeof(TCHAR) * (1 + _tcslen(tszSubKeyDescription) ));
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if( ERROR_SUCCESS != lResult ) goto Exit;
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} // if( fDelete ) ... else
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// ----
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// Exit
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// ----
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Exit:
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if( NULL != hkeySub )
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CloseHandle( hkeySub );
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if( NULL != hkeyMain )
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CloseHandle( hkeyMain );
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return( lResult );
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} // WriteKeyAndSubKey()
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//+----------------------------------------------------------------------------
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//
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// Function: RegisterForMarshaling
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//
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// Synopsis: This function takes the GUID ane name of an interface
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// for which MIDL-generated marshaling code exists in the
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// caller-specified DLL. First we try to update the
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// CLSID entries, but we'll fail this if the entries already
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// exist and reference OLE32 (OLE32 has better marshaling
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// code). If this doesn't fail, then we'll update the
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// Interface entries.
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//
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// The caller specifies if this "update" of the registry
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// is a write or a delete. This this routine can be used
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// in either a registration or a de-registration.
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//
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// Inputs: [const LPTSTR] tszGuid (in)
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// The GUID in registery format ("{...-...-...}")
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// [const LPTSTR] tszName (in)
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// The name of the interface
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// [const LPTSTR] tszDllPath (in)
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// The complete path and filename of the DLL which contains
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// the marshaling code.
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// [BOOL] fDelete (in)
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// Determines if we add to the Registry or delete from it.
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//
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// Returns: [long] a GetLastError() value
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//
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//+----------------------------------------------------------------------------
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long
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RegisterForMarshaling( const LPTSTR tszGuid,
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const LPTSTR tszName,
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const LPTSTR tszDllPath,
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BOOL fDelete )
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{
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// ------
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// Locals
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// ------
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long lResult;
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TCHAR tszMainKey[ MAX_PATH ];
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// -----------------------------------
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// Update HKEY_CLASSES_ROOT\Interfaces
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// -----------------------------------
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// Calculate the key name name
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_tcscpy( tszMainKey, TEXT( "Interface\\" ));
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_tcscat( tszMainKey, tszGuid );
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// Update the registry, but only if there isn't a current
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// entry pointing to OLE32's proxy/stub factory.
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lResult = UpdateKeyAndSubKey( tszMainKey,
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tszName,
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TEXT( "ProxyStubClsid32" ),
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tszGuid,
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tszOle32PSFactoryClsid,
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fDelete );
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if( ERROR_SUCCESS != lResult ) goto Exit;
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// ------------------------------
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// Update HKEY_CLASSES_ROOT\CLSID
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// ------------------------------
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// Calculate the name.
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_tcscpy( tszMainKey, TEXT( "CLSID\\" ));
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_tcscat( tszMainKey, tszGuid );
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// Update the entries. This will add the path (if !fDelete) or remove
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// the registry entry (if fDelete) regardless of the current state
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// of the key; if we weren't supposed to remove it, the previous
|
||
|
|
// call to UpdateKeyAndSubKey would have returned an error.
|
||
|
|
|
||
|
|
lResult = UpdateKeyAndSubKey( tszMainKey,
|
||
|
|
tszName,
|
||
|
|
TEXT( "InprocServer32" ),
|
||
|
|
tszDllPath,
|
||
|
|
NULL, // Add/delete, regardless of what exists
|
||
|
|
fDelete );
|
||
|
|
if( ERROR_SUCCESS != lResult ) goto Exit;
|
||
|
|
|
||
|
|
// ----
|
||
|
|
// Exit
|
||
|
|
// ----
|
||
|
|
|
||
|
|
Exit:
|
||
|
|
|
||
|
|
if( ERROR_ALREADY_EXISTS == lResult )
|
||
|
|
{
|
||
|
|
propDbg(( DEB_WARN, "IProp DLL UpdateKeyAndSubKey: Entry already exists\n" ));
|
||
|
|
lResult = ERROR_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
return( lResult );
|
||
|
|
|
||
|
|
} // RegisterForMarshaling()
|
||
|
|
|
||
|
|
|
||
|
|
//+----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Function: RegisterServer
|
||
|
|
//
|
||
|
|
// Synopsis: This routine can be used with both DllRegisterServer and
|
||
|
|
// DllUnregisterServer. It adds/deletes IPropertySetStorage
|
||
|
|
// IPropertyStorage, IEnumSTATPROPSETSTG, and IEnumSTATPROPSTG.
|
||
|
|
//
|
||
|
|
// Inputs: [BOOL] fDelete (in)
|
||
|
|
// Indicates whether the registry entries should be added
|
||
|
|
// or removed.
|
||
|
|
//
|
||
|
|
// Returns: [HRESULT]
|
||
|
|
//
|
||
|
|
//+----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
|
||
|
|
STDAPI RegisterServer( BOOL fDelete )
|
||
|
|
{
|
||
|
|
// ------
|
||
|
|
// Locals
|
||
|
|
// ------
|
||
|
|
|
||
|
|
LONG lResult;
|
||
|
|
|
||
|
|
// -----
|
||
|
|
// Begin
|
||
|
|
// -----
|
||
|
|
|
||
|
|
// Register IPropertySetStorage
|
||
|
|
lResult = RegisterForMarshaling( tszGuidPropertySetStorage,
|
||
|
|
tszNamePropertySetStorage,
|
||
|
|
tszNameDll,
|
||
|
|
fDelete );
|
||
|
|
if( ERROR_SUCCESS != lResult ) goto Exit;
|
||
|
|
|
||
|
|
// Register IPropertyStorage
|
||
|
|
lResult = RegisterForMarshaling( tszGuidPropertyStorage,
|
||
|
|
tszNamePropertyStorage,
|
||
|
|
tszNameDll,
|
||
|
|
fDelete );
|
||
|
|
if( ERROR_SUCCESS != lResult ) goto Exit;
|
||
|
|
|
||
|
|
// Register IEnumSTATPROPSETSTG
|
||
|
|
lResult = RegisterForMarshaling( tszGuidIEnumSTATPROPSETSTG,
|
||
|
|
tszNameIEnumSTATPROPSETSTG,
|
||
|
|
tszNameDll,
|
||
|
|
fDelete );
|
||
|
|
if( ERROR_SUCCESS != lResult ) goto Exit;
|
||
|
|
|
||
|
|
// Register IEnumSTATPROPSTG
|
||
|
|
lResult = RegisterForMarshaling( tszGuidIEnumSTATPROPSTG,
|
||
|
|
tszNameIEnumSTATPROPSTG,
|
||
|
|
tszNameDll,
|
||
|
|
fDelete );
|
||
|
|
if( ERROR_SUCCESS != lResult ) goto Exit;
|
||
|
|
|
||
|
|
|
||
|
|
// ----
|
||
|
|
// Exit
|
||
|
|
// ----
|
||
|
|
|
||
|
|
Exit:
|
||
|
|
|
||
|
|
if( ERROR_SUCCESS != lResult )
|
||
|
|
{
|
||
|
|
propDbg(( DEB_ERROR, "IProp DLL RegisterServer failed (%lu)\n", lResult ));
|
||
|
|
return( SELFREG_E_CLASS );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return( S_OK );
|
||
|
|
}
|
||
|
|
|
||
|
|
} // RegisterServer()
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//+----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Function: DllRegisterServer & DllUnregisterServer
|
||
|
|
//
|
||
|
|
// Synopsis: These routines are the standard DLL registration entry
|
||
|
|
// points for a self-registering in-proc COM server. They
|
||
|
|
// are used to register the property set marshaling code.
|
||
|
|
// These routines are called, for example,
|
||
|
|
// by a setup program during installation and de-installation,
|
||
|
|
// respectively.
|
||
|
|
//
|
||
|
|
//+----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
STDAPI DllRegisterServer()
|
||
|
|
{
|
||
|
|
return( RegisterServer( FALSE ));
|
||
|
|
}
|
||
|
|
|
||
|
|
STDAPI DllUnregisterServer()
|
||
|
|
{
|
||
|
|
return( RegisterServer( TRUE ));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void InitializeDebugging();
|
||
|
|
void UnInitializeDebugging();
|
||
|
|
|
||
|
|
BOOL WINAPI
|
||
|
|
DllMain( HANDLE hinst, DWORD dwReason, LPVOID lpv )
|
||
|
|
{
|
||
|
|
#if DBG == 1
|
||
|
|
{
|
||
|
|
if( DLL_PROCESS_ATTACH == dwReason )
|
||
|
|
InitializeDebugging();
|
||
|
|
else if( DLL_PROCESS_DETACH == dwReason )
|
||
|
|
UnInitializeDebugging();
|
||
|
|
}
|
||
|
|
#endif // #if DBG == 1
|
||
|
|
|
||
|
|
return( TRUE );
|
||
|
|
}
|