Kill the mouse wheel

I have a form with Autoscroll = true

When I scroll the mouse wheel and the focus is on a button or textbox, it is OK
But when the focus is on a control like combobox or a listview (any control having its own scrollbar) no scrolling at the form level occur

I want to kill the mouse wheel message sent to the combobox and send it back to the form.

In VB6 I ve done it using subclassing. Should I do the same (I think using System.Windows.Forms.Form.WndProc) or is there a better way.

and if this is the case, is there something like an Enum listing messages?

Sure you can cancel out the message WM_MOUSEWHEEL when the combo box is focused.

Yes, you do use the WndProc overrides

OK, where can I find the values for such messages?

In the WndProc overrides procedure like in post #2.

Just define your constant and place the code behind the form in question

Code:

---

Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
        Select Case m.Msg
                Case WM_MOUSEWHEEL
                        'Do your stuff here or cancel it by exiting the sub
                Case Else
                        '
        End Select
        MyBase.WndProc(m)
End Sub

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Rub I don't think it will work. I think the message is already in the message queue when WndProc gets the message. I guess it should be handled low-level.

Another option would be using mouse hook. Check Global Hooks in my signature. Use it to hook the mouse and use this code below.

vb Code:

Private Sub gmh_MouseWheel(ByVal sender As System.IntPtr, ByVal e As WindowsHookLib.LLMouseEventArgs) Handles gmh.MouseWheel
    If Me.ComboBox1.Focused Then
        e.Handled = True
    End If
End Sub

In post #3 I asked about the value of the WM_MOUSEWHEEL constant, where can I find these values e.g.

Code:

---

Public Const WM_MOUSEWHEEL As Integer = ??

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Is there a place of such values?

You can get API utilities like the API Viewer utility (link in my signature) or also at pinvoke.net for another.

Code:

---

Private Const WM_MOUSEWHEEL As Int32 = &H20A

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