[news.eclipse.platform.swt] GC: Working with setAlpha

[Andreas <a.rettig@xxxxxx>]

It seems that I still don't understand the principle of drawing in SWT...
I always thougt it behaves like a statemachine like OpenGL - that means 
i I call setAlpha(100), all following operations are drawn with alpha 100.

gc.setAlpha(100);
gc.fillRectangle(0, 0, 10,10);

Should draw a transparent Rectangle filled with the actual Background 
Color, shouldn't it?

But everything following gc.setAlpha() isn't drawn at all.

What am I doing wrong?
(Windows XP SP2, actual SWT Version)

Thanks in advance
Andreas