SendKey and combo box

[John Dio]

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("user 32.dll")]

public static extern IntPtr SetActiveWindow (IntPtr hWnd);



//sends a windows message to the specified window

[DllImport("user 32.dll")]

public static extern int SendMessage(Int Ptr hWnd, int Msg, uint wParam, int lParam);











public void SendKey(ushort key, IntPtr hWnd)

{

SetActiveWindow (hWnd);

// Control c = this.ActiveCont rol;

// MessageBox.Show (c.Name.ToStrin g());

SendMessage(hWn d, WM_KEYDOWN, key, 0);

// c = this.ActiveCont rol;

// MessageBox.Show (c.Name.ToStrin g());

// SendMessage(hWn d, 0, key, 0);

SendMessage(hWn d.Handle, WM_KEYUP, key, 0);

}







#endregion



private void button3_Click(o bject sender, EventArgs e)

{



SendKey((int)Ke ys.A, comboBox1.Handl e);

}





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



Thanks,

[Gaurav Vaish \(a.k.a. MasterGaurav\)]

Re: SendKey and combo box

SendMessage(hWn d, WM_KEYDOWN, key, 0);

SendMessage(hWn d.Handle, WM_KEYUP, key, 0);

You'll have to create the corresponding lParam and wParam.
Only "key-code" will not do.

http://msdn.microsoft.com/en-us/library/ms646280(VS.85).aspx

Try this out:
SendMessage(hWn d, WM_KEYDOWN, key, 0x220001)
SendMessage(hWn d, WM_KEYUP, key, 0xC0220001)

Derived from:

http://bytes.com/forum/thread124681.html

--
Happy Hacking,
Gaurav Vaish | http://dwt.sourceforge.net
http://blogs.mastergaurav.com | http://eduzine.edujini-labs.com
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