[lazarus] Win32 bug: tcontrol's painting themselves in tgroupboxes

[Micha Nelissen]

Hi,

The problem is the following: if a tcontrol paints itself to it's parent 
DC, and the parent's clientrect is different than the origin, the 
tcontrol's will paint themselves to the wrong position, namely the 
parent.topleft, not the topleft of the clientrect. This happens with 
TColorButton's in TGroupboxes for example. How do we solve this?

FYI: Delphi has not solved this, a control at position (0,0) in a 
tgroupbox is painted on top of the caption, while we want it in the 
clientrect.

Regards,

Micha.