C / C++ / MFC

DeleteFile("Source.txt");
DeleteFile("Time.txt");

DWORD dw = GetLastError(); 
if(GetLastError() != FALSE)
{
	MessageBox("File Not Found!","Error", MB_OK);
}

BOOL bResult=DeleteFile("Source.txt");
if(!bResult){
  DWORD dw=GetLastError();
  if(dw==ERROR_FILE_NOT_FOUND){
    MessageBox("File Not Found!","Error", MB_OK);
  }
  else{
    // DeleteFile failed, but it was not because the file didn't
    // exist. Other expected results are ERROR_PATH_NOT_FOUND and
    // ERROR_ACCESS_DENIED, though you cannot in general assume
    // that the error code will be always one of these.
    // Do whatever you consider appropriate in this situtation
  }
}