>I want to combine a combo with a treeview, so when the arrow is clicked, I am going to drop down the tree instead.

So does your ComboBox *ever* act like a ComboBox? Or are you simply using it to get a treeview to display? Are you trying to mimic the behavior of an old application that you're converting? I'm sorry, I just can't see why you want this kind of behavior from a ComboBox ... it is certainly not what most users would expect to see happen when they click on a Combo's down-arrow.

~~Bonnie



>
>
>
>>Kevin,
>>
>>What exactly is it that you want to accomplish? This sounds like very non-standard ComboBox functionality. If you'd tell us the whole story, maybe we'll have some other ideas.
>>
>>~~Bonnie
>>
>>
>>
>>
>>
>>>Thanks. This is exactly what I'm looking for. Next, I would like to raise an event inside IF called ArrowClicked if the message is
>>>WM_LBUTTONDOWN.
>>>
>>>I'm not sure how to code.
>>>
>>>
>>>
>>>>

>>>>public class MyComboBox : ComboBox
>>>>     protected override void WndProc(ref System.Windows.Forms.Message m)
>>>>     {
>>>>           if (m.Msg == 0x201 //WM_LBUTTONDOWN || m.Msg == 0x203)  //WM_LBUTTONDBLCLK
>>>>           {
>>>>                return;
>>>>           }
>>>>          base.WndProc(ref m);
>>>>     }
>>>>}
>>>>
>>>>or
>>>>
>>>>Public Class MyComboBox
>>>>     Inherits ComboBox
>>>>     Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
>>>>          If m.Msg = &H201 OrElse m.Msg = &H203 Then 'WM_LBUTTONDOWN or WM_LBUTTONDBLCLK
>>>>               Return
>>>>          End If
>>>>          MyBase.WndProc(m)
>>>>
>>>>     End Sub 'WndProc
>>>>End Class 'MyComboBox
>>>>
>>>>
>>>>