Sending keyboard inputs to combobox   

I am trying to create a on screen key board.
I simply want to send a key (Simulate the keyboard) to a combo box using the Handle of the control.

The below code is not working

   public const ushort WM_KEYDOWN = 0x0100;
        public const ushort WM_KEYUP = 0x0101;

        //Set the active window
        [DllImport("user32.dll")]
        public static extern IntPtr SetActiveWindow(IntPtr hWnd);

        //sends a windows message to the specified window
        [DllImport("user32.dll")]
        public static extern int SendMessage(IntPtr hWnd, int Msg, uint wParam, int lParam);


        
        

        public void SendKey(ushort key, IntPtr hWnd)
        {
        SetActiveWindow(hWnd);
      //  Control c = this.ActiveControl;
      //  MessageBox.Show(c.Name.ToString());
        SendMessage(hWnd, WM_KEYDOWN, key, 0);
     //    c = this.ActiveControl;
      //   MessageBox.Show(c.Name.ToString());
     //   SendMessage(hWnd, 0, key, 0);
         SendMessage(hWnd.Handle, WM_KEYUP, key, 0);
        }



        #endregion

        private void button3_Click(object sender, EventArgs e)
        {
            
            SendKey((int)Keys.A, comboBox1.Handle);
        }


I have tested  SendKeys, Key_evnt and sendinput, they don't satisfy what is needed.

Thanks,

date: Thu, 10 Jul 2008 17:03:15 -0700   author:   John Dio

Sending keyboard inputs to combobox   

Sorry I am new to this forum , wanted to post it under C#. As this is the language I am using. Don't know how to delete it now.

My Appologies.

date: Thu, 10 Jul 2008 17:08:41 -0700   author:   John Dio