Transparent Canvas (Bitmap Image)

[Cuttlas]

I have created a TBitmap Image and I'm filling it in using Canvas.

I need to make it transparent, with no border, and no background color. is this possible? if yes, how?


var
CustomButton: TBitmapImage;

// Drawing
//*************
procedure RedrawCustomButton;
var
Canvas: TCanvas;
begin
Canvas := CustomButton.Bitmap.Canvas;

Canvas.Pen.Style := psClear;
Canvas.Brush.Color := clBtnFace;
Canvas.Rectangle(0, 0, CustomButton.Bitmap.Width, CustomButton.Bitmap.Height);

Canvas.Pen.Style := psSolid;
Canvas.Pen.Mode := pmCopy;
Canvas.Pen.Color := clBlack;
Canvas.Brush.Style := bsClear;
Canvas.Rectangle(0, 0, CustomButton.Bitmap.Width, CustomButton.Bitmap.Height);
end;
//*************

procedure InitializeWizard();
var
Page: TWizardPage;
begin
WizardForm.InnerPage.Color := clYellow;

Page := CreateCustomPage(wpWelcome, '', '');

CustomButton := TBitmapImage.Create(WizardForm);
CustomButton.Parent := Page.Surface;
CustomButton.Top := 0;
CustomButton.Left := 0;
CustomButton.Width := ScaleX(128);
CustomButton.Height := ScaleX(32);
CustomButton.Bitmap.Width := CustomButton.Width;
CustomButton.Bitmap.Height := CustomButton.Height;
RedrawCustomButton;
end;