[Gambas-user] Drawing using tranparency

[Marco Colnaghi Libero IMAP]

I'm trying to blend together 2 images but with bad results.

just to start this work I have some questions I can't find an answer:

Is there a function giving back the red (or green or blue) component of a 
color? (equivalent to qRed in QT)

How can I change the alpha level of an image? Putting transparency to true 
enables transparency but I can't figure out how to dim the image before 
printing.

How can I print an image using alpha channel too?

Thanks in advance,
Marco.