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POcalling GetModuleFileNameEx via psapi.dll is not working, but why?
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  1. POcalling GetModuleFileNameEx via psapi.dll is not working, but why?
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    copied!<p>I am using MinGW which does not have full functionality. eg. It has no wchar_t stream support. I've managed to get around that by writing a mini-set of manipulators (the wcusT() in the code below).. but I find I'm getting stymied again with GetModuleFileNameEx. I have not been able to natively run GetModuleFileNameEx() This function is defined in <code>&lt;psapi.h&gt;</code>, but there seems to be nothing for it to link to. That is my no.1 question: Can/does/is MinGW able to run GetModuleFileNameEx? What do I need to do? Am I missing something simple? As a workaround, I've tried to run it indirectly via a call to its dll (psapi.dll) which is in the Windows system32 folder... but something is wrong. I've got another no-go situation. I'd appreciate any comments on the code below .. thanks</p> <pre><code>int WINAPI WinMain (HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nCmdShow) { /// typedef and load a dll function /// =============================== typedef DWORD (__stdcall *foo)(HANDLE, HMODULE, LPTSTR, DWORD); LPTSTR ptcPSAPI_DLL = _T("C:\\WINDOWS\\system32\\psapi.dll"); HMODULE hPSAPI_DLL = LoadLibrary(ptcPSAPI_DLL); if( !hPSAPI_DLL ) { std::cout&lt;&lt;"ERROR: Failed to load "&lt;&lt;wcusT(ptcPSAPI_DLL)&lt;&lt;std::endl; return 1; } foo GetModFnEx=(foo)GetProcAddress(hPSAPI_DLL, #ifdef UNICODE "GetModuleFileNameExW"); #else "GetModuleFileNameExA"); #endif /// call the dll library function /// ============================= HWND hWndNPP = FindWindow(_T("Notepad++"),NULL); // the window calass name TCHAR ytcMFqFn[FILENAME_MAX]; // the buffer for the file name DWORD dwBytes = (GetModFnEx)( hWndNPP, NULL, ytcMFqFn, sizeof(ytcMFqFn) ); DWORD dwError = GetLastError(); std::cout&lt;&lt;wcusT(_T("hWndNPP "))&lt;&lt;"="&lt;&lt;hWndNPP &lt;&lt;"="&lt;&lt;std::endl; std::cout&lt;&lt;wcusT(_T("ytcMFqFn "))&lt;&lt;"="&lt;&lt;wcusT(ytcMFqFn)&lt;&lt;"="&lt;&lt;std::endl; std::cout&lt;&lt;wcusT(_T("dwBytes "))&lt;&lt;"="&lt;&lt;dwBytes &lt;&lt;"="&lt;&lt;std::endl; std::cout&lt;&lt;wcusT(_T("dwError "))&lt;&lt;"="&lt;&lt;dwBytes &lt;&lt;"="&lt;&lt;std::endl; return 0; // Output =============== // SBCS // hWndNPP =0x320606= // ytcMFqFn == // dwBytes =0= // dwError =0= // UNICODE // h W n d N P P =0x320606= // y t c M F q F n =(☻æ|♀ = // d w B y t e s =0= // d w E r r o r =0= // ====================== </code></pre>
 

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