93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
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/******************************************************************************
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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lib.cpp
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Abstract:
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This file contains the implementation of the HCApi Library.
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Revision History:
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Davide Massarenti (Dmassare) 04/15/2000
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created
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******************************************************************************/
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#include "StdAfx.h"
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////////////////////////////////////////////////////////////////////////////////
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static const WCHAR c_HelpCtr[] = HC_ROOT_HELPSVC_BINARIES L"\\HelpCtr.exe";
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////////////////////////////////////////////////////////////////////////////////
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HRESULT HCAPI::OpenConnection( /*[out]*/ CComPtr<IPCHHelpHost>& ipc )
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{
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__HCP_FUNC_ENTRY( "HCAPI::OpenConnection" );
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HRESULT hr;
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PROCESS_INFORMATION piProcessInformation;
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STARTUPINFOW siStartupInfo;
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CLSID clsidCaller;
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::ZeroMemory( (PVOID)&piProcessInformation, sizeof( piProcessInformation ) );
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::ZeroMemory( (PVOID)&siStartupInfo , sizeof( siStartupInfo ) ); siStartupInfo.cb = sizeof( siStartupInfo );
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__MPC_EXIT_IF_METHOD_FAILS(hr, ::CoCreateGuid( &clsidCaller ));
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//
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// Create the process, passing the clsid to locate the IPCHHelpHost object. Try contacting the process for 10 seconds, then quit.
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//
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{
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CComBSTR bstrCaller( clsidCaller );
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MPC::wstring strExe ( c_HelpCtr ); MPC::SubstituteEnvVariables( strExe );
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int iRetries = 100;
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strExe += L" -Controlled ";
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strExe += SAFEBSTR( bstrCaller );
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__MPC_EXIT_IF_CALL_RETURNS_FALSE(hr, ::CreateProcessW( NULL ,
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(LPWSTR)strExe.c_str() ,
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NULL ,
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NULL ,
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FALSE ,
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NORMAL_PRIORITY_CLASS,
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NULL ,
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NULL ,
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&siStartupInfo ,
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&piProcessInformation ));
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while(iRetries--)
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{
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CComPtr<IRunningObjectTable> rt;
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CComPtr<IMoniker> moniker;
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CComPtr<IUnknown> obj;
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::Sleep( 100 );
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__MPC_EXIT_IF_METHOD_FAILS(hr, ::GetRunningObjectTable( 0, &rt ));
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__MPC_EXIT_IF_METHOD_FAILS(hr, ::CreateClassMoniker ( clsidCaller, &moniker ));
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if(SUCCEEDED(rt->GetObject( moniker, &obj )) && obj)
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{
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__MPC_SET_ERROR_AND_EXIT(hr, obj.QueryInterface( &ipc ));
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}
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}
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}
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hr = REGDB_E_CLASSNOTREG;
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__HCP_FUNC_CLEANUP;
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if(piProcessInformation.hProcess) ::CloseHandle( piProcessInformation.hProcess );
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if(piProcessInformation.hThread ) ::CloseHandle( piProcessInformation.hThread );
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__HCP_FUNC_EXIT(hr);
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}
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