[DllImport("user32.dll")]
		public static extern int SendMessage(IntPtr hwnd, uint wMsg, IntPtr wParam, ref string lParam);
 
private static string GetControlText(int hwnd)
		{
			string text = "";
			int strLen = SendMessage((IntPtr)hwnd, WM_GETTEXTLENGTH, (IntPtr)0, ref text);
			if(strLen > 0)
			{
				string sBuff = new String('\0', strLen + 1);
				strLen += 1;
				int retVal = SendMessage((IntPtr)hwnd, WM_GETTEXT, (IntPtr)strLen, ref sBuff);
				if(strLen == retVal)
				{
					text = sBuff;
				}				
			}
			return text;
		}