public static int GetClassName(IntPtr hWnd, out string lpString)
{
WindowsAPI.STRINGBUFFER sTRINGBUFFER = default(WindowsAPI.STRINGBUFFER);
int className = WindowsAPI.GetClassName(hWnd, out sTRINGBUFFER, 512);
lpString = sTRINGBUFFER.szText;
return(className);
}