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class Test
{
  [STAThread]
  static void Main(string[] args)
  {

    WinAPI.SendMessage ((IntPtr)hWnd, WinAPI.WM_SYSCOMMAND,
WinAPI.SC_MAXIMIZE,0);
    WinAPI.SendMessage ((IntPtr)hWnd, WinAPI.WM_CHAR, (int)(Keys.A), 0);
    WinAPI.SendMessage ((IntPtr)hWnd, WinAPI.WM_KEYDOWN, (int)(Keys.A), 0);
  }

    [DllImport ("user32.dll")]
            public static extern int SendMessage(IntPtr hWnd, int Msg, int
wParam, int lParam);

    [DllImport("User32.dll")]
           public static extern int FindWindow(string lpClassName, string
lpWindowName);

The first SendMessage to maximize the Notepad window is working fine.
However I could not get the second or third line of SendMessage() to work.
What is wrong?

Any idea how do I send to Notepad the "Alt+F" key (press Alt and hold and
press F key)?

Appreciate some hints, guidance or help. Thanks a lot.

You should send the messages to the TextBox window in the NotePad, not its
parent window. Also, if you use the WM_KEYDOWN message, call PostMessage
instead of the SendMessage, otherwise you cannot get the WM_CHAR message.
For example:

bool ret=WinAPI.BringWindowToTop((IntPtr)hWnd);
int hWndEditor=WinAPI.GetWindow((IntPtr)hWnd,WinAPI.GW_CHILD);   //retrieve
the handle to the TextBox window, which is a child window of the NotePad
window

WinAPI.SendMessage ((IntPtr)hWnd, WinAPI.WM_SYSCOMMAND,
WinAPI.SC_MAXIMIZE,0);
//WinAPI.SendMessage ((IntPtr)hWndEditor, WinAPI.WM_CHAR, (int)(Keys.A), 0);
WinAPI.PostMessage  ((IntPtr)hWndEditor, WinAPI.WM_KEYDOWN, (int)(Keys.A),
0);

Hope this helps.

Regards,

Felix Wu
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This posting is provided "AS IS" with no warranties, and confers no rights.

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