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[Dummy1912]

hello,

can anyone tell me why i get always a black backcolor instead of transparent color
even search on google it seems i do everything correct and still gets a black color

Code: Select all

    Inherits Button
    Public Sub New()
        Me.SetStyle(ControlStyles.AllPaintingInWmPaint Or _
                ControlStyles.UserPaint Or _
               ControlStyles.OptimizedDoubleBuffer, True)
        BackColor = Color.Transparent
    End Sub

Code: Select all

Protected Overrides Sub OnPaint(pevent As PaintEventArgs)
        Dim g As Graphics = pevent.Graphics
        g.SmoothingMode = SmoothingMode.AntiAlias
        g.Clear(Color.Transparent)
        g.DrawImage(Frmpl.Px1.Image, 0, 0, 39, 41)
    End Sub

thanks

[XTechVB]

Try removing this line

Code: Select all

g.Clear(Color.Transparent)

[Shim]

Maybe the picture has that backcolor

[Dummy1912]

Try removing this line

Code: Select all

g.Clear(Color.Transparent)

#XTechVB,

tried it, but when run app black color comes back :(

[noypikami]

the bitmap is empty that is why it's color is black.
try to make a rectangle and fill it with the (new solidbrush(me.backcolor))

[XTechVB]

What are you trying to do? Draw a PNG image while keeping it's transparent background?

[noypikami]

i guess he/she is making a class for a custom control.
i pretty sure, that the bitmap will turn out black , because its empty.
it's just set to the size of the control or something.

[smashapps]

#Dummy1912 try this:

Code: Select all

Public Sub InitializeMyForm()
    BackColor = Color.Black
    ' Make the background color of form display transparently.
    TransparencyKey = BackColor
End Sub 'InitializeMyForm

To have a transparent color on the form, it needs to have a TransparencyKey set to the same color that you want transparent.

Hope I helped, and the code is from MSDN.

[Dummy1912]

#smashapps sorry but this can't be used:
'TransparencyKey' is not declared. It may be inaccessible due to its protection level.

#noypikami
last time we checked i'm still a HE :lol:

[XTechVB]

'TransparencyKey' is not declared. It may be inaccessible due to its protection level.

I believe only "Form" type controls have the "TransparencyKey" property. Won't work on other controls.