Sample Code
windows driver samples/ WDF Hybrid 1394 Virtual Device Sample Driver/ C++/ exe/ debug.c/
/*++ Copyright (c) 1998 Microsoft Corporation Module Name: debug.c --*/ #define _DEBUG_C #include "pch.h" #undef _DEBUG_C void DbgPrt( _In_ HANDLE hWnd, _In_ PSTR lpszFormat, ... ) { char buf[STRING_SIZE] = {"\0"}; // = "WIN1394: "; HRESULT hr = S_OK; va_list ap; va_start(ap, lpszFormat); hr = StringCbVPrintf( &buf[0] , (STRING_SIZE * sizeof(buf[0])) , lpszFormat, ap); if (FAILED(hr)) { // not much we can do here for logging, but we shouldn't try to send // the results of a failure down to the output streams. return; } #if defined(DBG) OutputDebugStringA(buf); #endif if (hWnd) WriteTextToEditControl(hWnd, buf); va_end(ap); }
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