Make background of graphics object transparent.

[Kalvin]

I keep getting my string inside a black box with this code.
I would like to make the background transparent. Any help on this will
be appreciated very much.

'**** BEGIN CODE ****
Try

Dim NewFont As New Font(fg.Font.Fo ntFamily, 10, FontStyle.Regul ar)

Dim g As Graphics

Dim pic As Bitmap = New Bitmap(20, 20,
imaging.PixelFo rmat.Format24bp pRgb)

g = Graphics.FromIm age(pic)

g.Clear(Color.T ransparent)

g.DrawString("H ", NewFont, Brushes.Blue, 0, 0)
Dim st As New System.IO.Memor yStream

pic.Save(st, System.Drawing. Imaging.ImageFo rmat.Bmp)
Dim img As Image = Image.FromStrea m(st)
pct.Image = img

Catch exc As Exception
Stop

End Try
'**** END CODE ****

Kalvin

[Ken Tucker [MVP]]

Hi,

Try something like this.

Try

Dim g As Graphics

Dim pic As Bitmap = New Bitmap(20, 20, Imaging.PixelFo rmat.Format24bp pRgb)

g = Graphics.FromIm age(pic)

g.Clear(Color.Y ellow)

g.DrawString("H ", Me.Font, Brushes.Blue, 0, 0)

pic.MakeTranspa rent(Color.Yell ow)

'Dim st As New System.IO.Memor yStream

'pic.Save(st, System.Drawing. Imaging.ImageFo rmat.Bmp)

'Dim img As Image = Image.FromStrea m(st)

PictureBox1.Ima ge = pic

Catch exc As Exception

Stop

End Try

Ken

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

"Kalvin" <kt***@streck.c om> wrote in message
news:11******** **************@ o13g2000cwo.goo glegroups.com.. .
I keep getting my string inside a black box with this code.
I would like to make the background transparent. Any help on this will
be appreciated very much.

'**** BEGIN CODE ****
Try

Dim NewFont As New Font(fg.Font.Fo ntFamily, 10, FontStyle.Regul ar)

Dim g As Graphics

Dim pic As Bitmap = New Bitmap(20, 20,
imaging.PixelFo rmat.Format24bp pRgb)

g = Graphics.FromIm age(pic)

g.Clear(Color.T ransparent)

g.DrawString("H ", NewFont, Brushes.Blue, 0, 0)
Dim st As New System.IO.Memor yStream

pic.Save(st, System.Drawing. Imaging.ImageFo rmat.Bmp)
Dim img As Image = Image.FromStrea m(st)
pct.Image = img

Catch exc As Exception
Stop

End Try
'**** END CODE ****

Kalvin

[Kalvin]

Thank you very much for your reply. I did try that, but what I wind up
with is still a black background. When I use the
pic.clear(color .yellow) line without the
pic.MakeTranspa rent(Color.Yell ow) line, I get a yellow background, as
soon as I add the maketransparent call execute, I get the black
background again. I did find that if I don't save it to the
memoryStream, then the background is transparent. Is there something
with the memory stream that is going to color the background?

Kalvin

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