>I try to open BMP file from VFP in Windows Paintbrush. Controls option menu allows to register and use Paintbrush as Insertable object in Form Designer but I cannot find any ways to load file into Paintbrush window (surely I can call Paintbrush as external exe, but it's not the way I am looking for).

I never triew working wiht paintbrush under VFP
but, what version of VFP are u using
VFP5.0 should list all the methods and properties of the object
also try to rightclick on the object and see what options are available

another thing that might help is to try search MS KB - under OLE or under misc. applications

Arnon