/// <summary>
///
/// </summary>
/// <param name="errorCode">HRESULT</param>
/// <param name="sb">buffer</param>
/// <param name="errorMsg">output error message</param>
/// <returns>Return false IFF when buffer space isnt enough</returns>
private static unsafe bool TryGetMessage(int errorCode, int bufferSize, out string errorMsg)
{
errorMsg = null;
char[] buffer = new char[bufferSize];
int result;
fixed(char *pinned_lpBuffer = buffer)
{
result = ExternalInterop.FormatMessage(
FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_ARGUMENT_ARRAY | FORMAT_MESSAGE_MAX_WIDTH_MASK,
IntPtr.Zero, (uint)errorCode, 0, pinned_lpBuffer,
(uint)buffer.Length, IntPtr.Zero);
}
if (result != 0) //result hold the number of WCHARs stored in the output buffer(sb)
{
if (buffer[result - 1] == ' ')
{
buffer[result - 1] = '\0';
result = result - 1;
}
errorMsg = new string(buffer, 0, result);
return(true);
}
else
{
if (ExternalInterop.GetLastWin32Error() == ERROR_INSUFFICIENT_BUFFER)
{
return(false);
}
return(true);
}
}
public static void SaveLastWin32Error()
{
s_lastWin32Error = ExternalInterop.GetLastWin32Error();
}