ScrollBar move event?

[Michael]

Hi, there,
I need to intercept scrollbar move event for a panel
control to do something. But I cannot seem to find any
event in ScrollControls that can let me do that.
Thanks for the help.

Michael

 

[Ken Tucker [MVP]]

Hi,

You have to create an inherited control. Override WndProc the
wm_hscroll and wm_vscroll messages are sent when the panel is scrolled.

Public Class ScrollPanel

Inherits System.Windows.Forms.Panel



Public Event PanelScroll(ByVal sender As Object, ByVal e As EventArgs)

Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)

Const WM_HSCROLL = &H114

Const WM_VSCROLL = &H115

If m.Msg = WM_HSCROLL Or m.Msg = WM_VSCROLL Then

RaiseEvent PanelScroll(Me, New EventArgs)

End If

MyBase.WndProc(m)

End Sub

End Class

Ken