84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 1999 - 1999
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//
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// File: snaphelp.h
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//
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//--------------------------------------------------------------------------
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#ifndef _ATLSNAPHELP_H_
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#define _ATLSNAPHELP_H_
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//
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// Include files
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//
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#include "htmlhelp.h"
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//
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// Allocates memory for a string, copies the string,
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// and returns it to the caller. Throws exceptions.
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//
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inline LPOLESTR CoTaskDupString( LPOLESTR pszInput )
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{
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USES_CONVERSION;
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LPOLESTR pszOut = NULL;
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//
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// We throw an exception if the following allocation fails.
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//
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pszOut = (LPOLESTR) CoTaskMemAlloc( ( wcslen( pszInput ) + 1 ) * sizeof( OLECHAR ) );
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if ( pszOut == NULL )
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throw;
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wcscpy( pszOut, pszInput );
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return( pszOut );
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};
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template <class T>
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class ATL_NO_VTABLE ISnapinHelpImpl : public ISnapinHelp
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{
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public:
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//
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// Returns a helpfile name using the ATL module name
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// and appending the appropriate suffix onto the filename.
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//
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STDMETHOD( GetHelpTopic )( LPOLESTR* lpCompiledHelpFile )
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{
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_ASSERT( lpCompiledHelpFile != NULL );
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USES_CONVERSION;
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HRESULT hr = E_FAIL;
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TCHAR szPath[ _MAX_PATH * 2 ];
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TCHAR szDrive[ _MAX_DRIVE * 2 ], szDir[ _MAX_DIR * 2 ];
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TCHAR szName[ _MAX_FNAME * 2 ], szExt[ _MAX_EXT ];
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try
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{
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//
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// Get the module filename.
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//
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if ( GetModuleFileName( _Module.GetModuleInstance(), szPath, sizeof( szPath ) / sizeof( TCHAR ) ) == NULL )
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throw;
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//
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// Split the given path.
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//
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_tsplitpath( szPath, szDrive, szDir, szName, szExt );
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_tmakepath( szPath, szDrive, szDir, szName, _T( ".chm" ) );
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//
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// Allocate the string and return it.
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*lpCompiledHelpFile = CoTaskDupString( T2W( szPath ) );
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hr = S_OK;
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}
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catch( ... )
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{
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}
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return( hr );
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}
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};
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#endif
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