Hi Pablo,

Here is an example of FoxPro code (members area):
Subclassing CommandButton control to create BackColor property
http://www.news2news.com/vfp/?example=392

Exactly as Craig suggested, this code creates a temporary bitmap file and assigns it to CommandButton's Picture property.

A similar example:
Vertical Label control
http://www.news2news.com/vfp/?example=398