Opdatering af Canvas???

FillRect(Canvas.Handle,<Rect>,<Brush>);

Du må uddybe det lidt mere, jeg kan ikke få det til at virke......

with Image1.Canvas do
begin
  Brush.Color := clWhite;
  Brush.Style := bsSolid;
  FillRect(ClipRect);
end;

du kan også skrive: Image1.Picture.Bitmap.Canvas

Hvor svært er det at skrive fillrect og trykke på F1 ???

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TCanvas.FillRect

TCanvas    See also     Example

Fills the specified rectangle on the canvas using the current brush.

procedure FillRect(const Rect: TRect);

Description

Use FillRect to fill a rectangular region using the current brush. The region is filled including the top and left sides of the rectangle, but excluding the bottom and left edges.