Question ToolStripComboBox flicker

[gchq]

Hi there

I have a dynamically built form with a ToolStrip and a RTB. The RTB has MouseUp and and KeyUp events attached (that change the ToolStripButtons image and ToolTipText depending upon the cursor position) . Every time an event occurs the ToolStripCombobox flickers (very badly)

I have changed the form to a custom control like this:-

Public Class No_Flicker_Form
        Inherits Form
        Protected Overrides Sub OnLayout(ByVal levent As System.Windows.Forms.LayoutEventArgs)
            MyBase.OnLayout(levent)
            MyBase.SetStyle(ControlStyles.UserPaint, True)
            MyBase.SetStyle(ControlStyles.AllPaintingInWmPaint, True)
            MyBase.SetStyle(ControlStyles.OptimizedDoubleBuffer, True)
            MyBase.UpdateStyles()
        End Sub
    End Class

But that has no effect at all.

Any ideas?

Thanks

 

[gchq]

Worked around this by placing the ToolStripComboBox(s) in a seperate ToolStrip