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QuestionOnPaintBackground and transparency Pin
Harpee27-Oct-17 22:24
Harpee27-Oct-17 22:24 
Hi there. Simple question or so I hope. I have two forms. Form1 is showing a directshow video stream. The second, form2, overlaid, is basically a splashscreen, adobe photoshop style, with transparency. Both forms work fine. HOWEVER, the transparency is only rendered for the first frame as form2 is displayed. Then, as the video changes behind it, the form2 region is not updated (ie the transparent bits remain what was on the screen when it was first drawn, almost as if it was a screen grab)

I am assuming it is because the OnPaintBackground sub which paints the transparent form is only called once, as the form loads. So how can I keep it updating so that the actual live video shows thru the transparent bits? This is what I have :

VB
Protected Overrides Sub OnPaintBackground(ByVal pevent As System.Windows.Forms.PaintEventArgs)

     Dim gfx As dra.Graphics = pevent.Graphics

     Dim IMA As Image
     IMA = Image.FromFile("D:\WORK\myfile.png", True)

     gfx.DrawImage(IMA, New dra.Rectangle(0, 0, Me.Width, Me.Height))

 End Sub

AnswerRe: OnPaintBackground and transparency Pin
Dave Kreskowiak28-Oct-17 4:16
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QuestionUse a custom cursor from a filr Pin
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Questionvb.net edit Pin
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