compiling just user32.dll

[Benzakhar]

I got wine sources and I'm on a debian system. So I want to edit the 
function GetMenuBarInfo in user32.dll to just fill in the menu structure 
with some fake/resonable/constant values. I want to do this cause I 
think visual boy advance looks at those values and resets the screen 
size. And unfortunatly everytime it does it I have to press ALT+click to 
move it up to see the resize on bottom right and resize. I'm thinking 
just put some fake values especialy for the rect sturcture and have wine 
use it.

I don't want to recompile the whole thing I'm just hoping I can compile 
just the user32.dll put it into windows/system32 and tell wine (which is 
installed from package manager) via winecfg to simply use that dll.

Is it possible and easy for me? I already found GetMenuBarInfo and it 
just calls FIXME; I need to change it to modify the structure and 
compile user32.dll.

Thank you