Codenstuff.com

Posted: **Sat Jan 07, 2017 1:48 pm**

Hello,

We have created our own controls and seems after run
we gets white flickering loading the forms

All our controls have the same code:

Code: Select all

Protected Overrides Sub OnCreateControl()
        MyBase.OnCreateControl()
        Try
            ParentForm.FormBorderStyle = FormBorderStyle.None
            ParentForm.AllowTransparency = False
            ParentForm.TransparencyKey = Color.Fuchsia
            ParentForm.FindForm.StartPosition = FormStartPosition.CenterScreen
        Catch ex As Exception
        End Try
        DoubleBuffered = True
        Dock = DockStyle.Fill
        TabStop = False
        Invalidate()
    End Sub

Code: Select all

Sub New()
        Me.SetStyle(ControlStyles.AllPaintingInWmPaint Or ControlStyles.OptimizedDoubleBuffer, True)
        Me.SetStyle(ControlStyles.ResizeRedraw, True)
        Me.SetStyle(ControlStyles.DoubleBuffer, True)
        SetStyle(ControlStyles.UserPaint Or ControlStyles.SupportsTransparentBackColor, True)
        Font = New Font("Segoe UI", 9)
    End Sub

anyone has a new solution please?

Thanks

Posted: **Sat Jan 07, 2017 3:57 pm**

I think you may get flickering no matter what you do and it also depends on how powerful the users machine is to how much flickering they get and how long it takes to load.

You could try using SuspendLayout() and ResumeLayout() property
https://msdn.microsoft.com/en-us/librar ... .110).aspx

or

BeginUpdate() and EndUpdate()
https://msdn.microsoft.com/en-us/librar ... .110).aspx

Those may help a little.

Posted: **Sat Jan 07, 2017 4:16 pm**

Hi again,

Well this don't work

Code: Select all

Me.SuspendLayout()

and this

Code: Select all

 .BeginUpdate()

my controls don't has this option :(

any other ideas

Posted: **Sun Jan 08, 2017 9:06 am**

pfff what a night...

we have solved it
the flickering are less so its hard to tell

so happy

thanks codenstuff for the idea

solution:
added this on top of our class from the custom control

Code: Select all

    Protected Overrides ReadOnly Property CreateParams() As System.Windows.Forms.CreateParams
        Get
            Dim cp As CreateParams = MyBase.CreateParams
            cp.ExStyle = cp.ExStyle Or &H2000000
            Return cp
        End Get
    End Property

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