Transparent images in VB

[mr_penguin]

I'm trying to get an image to fade from solid to transparent. I'm using photoshop to make the image but when I use it in VB it makes the transparent part white. I've tried using different formats and using an alpha layer.

Also I'm trying to make a TrackBar control the opacity of the form but I can't seem to get it to work right. This is what I've done:

Code: Select all

Private Sub TrackBar1_Scroll(ByVal sender As Object, ByVal e As System.EventArgs) Handles TrackBar1.Scroll
        Form1.Opacity = Me.TrackBar1.Value
End Sub

Doing that just makes the opacity 0 or 100, I've set the maximum value to 100 and the min to 0 but that still didn't work.

[Patrickssj6]

Opacity goes from 0 to 1 in floating point numbers e.g. 0.1 makes it 10% transparent.

[mr_penguin]

so I should leave the code the same but change it to:

Form1.Opacity = Me.TrackBar1.Value / 100

Edit: thats works

[Patrickssj6]

How about you try it...

[Dagger13]

or you can just make the trackbar 0 to 1
for the other thing i found one on a vb site i forgot witch one but maybe you can google it then if you find one with a search box then search w/e on that site


i seen the code before a long time ago tho but i know it was like one line to change the alpha to 0(or anything) and it had "matrix" in it

[Jdogg]

I had this probme before
Here it is.

Code: Select all

Dim opac as integer
opac = TrackBar1.Value * 0.01
Me.Opacity = opac

[mr_penguin]

Well now that the least needed fix is solved, how can I get transparent images to work?