How can I paint the whole form on a bitmap?

Question

I want to paint the whole form including its caption bar and frame on a TBitmap object.

GetFormImage is cool, but it has two problems:

Answer 1

About capturing form image when hidden, use

AlphaBlend := true;
AlphaBlendValue := 0;

while form is shown. The user will not see the form but GetFormImage() will capture its canvas. I think this can work with "OnTheFly" suggestion too.