Re: still no success binding DLL's callback function

[cumulonimbus]

FLTK's widgets are full on pointers, and coordinates in FLTK-1.3 are at least 
32-bit (they were 16-bit in FLTK-1.0 and FLTK-1.1); You might have problems 
from the int16<>ptr mismatch, as well as the int16<->int32 mismatch if you ever 
use coordianates > 32768.