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.NET Forum / Languages / VB.NET / October 2004

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SetPixel question

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Matthew - 17 Oct 2004 23:39 GMT
I have put the following in my Form1_Load event:

Dim Img As Bitmap = New Bitmap(1, 1)
Img.SetPixel(0, 0, Color.Green)
BackgroundImage = Img
TransparencyKey = Img.GetPixel(0, 0)

This makes the background green.  It should make the background transparent.

If you comment out the second line, it actually works properly.  However, I
need the image to be green.

Any ideas?

Matthew
Ken Tucker [MVP] - 18 Oct 2004 01:31 GMT
Hi,

       Why not try something like this

Private Sub Form1_Paint(ByVal sender As Object, ByVal e As
System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint

Me.TransparencyKey = Color.Green

e.Graphics.FillRectangle(Brushes.Green, Me.ClientRectangle)

End Sub

Ken

-------------------------------

I have put the following in my Form1_Load event:

Dim Img As Bitmap = New Bitmap(1, 1)
Img.SetPixel(0, 0, Color.Green)
BackgroundImage = Img
TransparencyKey = Img.GetPixel(0, 0)

This makes the background green.  It should make the background transparent.

If you comment out the second line, it actually works properly.  However, I
need the image to be green.

Any ideas?

Matthew
Matthew - 18 Oct 2004 04:27 GMT
> Me.TransparencyKey = Color.Green
> e.Graphics.FillRectangle(Brushes.Green, Me.ClientRectangle)

That's perfect.
Thanks Ken!

Matthew

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