public class GetTextTestClass{
[System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "SendMessage", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
public static extern bool SendMessage(IntPtr hWnd, uint Msg, int wParam, StringBuilder lParam);
[System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr SendMessage(int hWnd, int Msg, int wparam, int lparam);
const int WM_GETTEXT = 0x000D;
const int WM_GETTEXTLENGTH = 0x000E;
public string GetControlText(IntPtr hWnd){
// Get the size of the string required to hold the window title (including trailing null.)
Int32 titleSize = SendMessage((int)hWnd, WM_GETTEXTLENGTH, 0, 0).ToInt32();
// If titleSize is 0, there is no title so return an empty string (or null)
if (titleSize == 0)
return String.Empty;
StringBuilder title = new StringBuilder(titleSize + 1);
SendMessage(hWnd, (int)WM_GETTEXT, title.Capacity, title);
return title.ToString();
}
}