getLastError.cpp

#include <Windows.h>
#include <tchar.h>
#include <strsafe.h>
void getErrorInfo(LPTSTR funcName)
{
	LPVOID lpMsgBuf;
	LPVOID lpDisplayBuf;
	DWORD dw = GetLastError();

	FormatMessage(
		FORMAT_MESSAGE_ALLOCATE_BUFFER |
		FORMAT_MESSAGE_FROM_SYSTEM |
		FORMAT_MESSAGE_IGNORE_INSERTS,
		NULL,
		dw,
		MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
		(LPTSTR)&lpMsgBuf,
		0, NULL);

	// Display the error message and exit the process

	lpDisplayBuf = (LPVOID)LocalAlloc(LMEM_ZEROINIT,
		(lstrlen((LPCTSTR)lpMsgBuf) + lstrlen((LPCTSTR)funcName) + 40) * sizeof(TCHAR));
	StringCchPrintf((LPTSTR)lpDisplayBuf,
		LocalSize(lpDisplayBuf) / sizeof(TCHAR),
		TEXT("%s failed with error %d: %s"),
		funcName, dw, lpMsgBuf);
	MessageBox(NULL, (LPCTSTR)lpDisplayBuf, TEXT("Error"), MB_OK);
	LocalFree(lpMsgBuf);
	LocalFree(lpDisplayBuf);
	ExitProcess(dw);
}