FileForums - Transparent Canvas (Bitmap Image)

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?

Code:

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;