Then use the Pascal calling convention, which is the same as C except in reverse. Then you don’t need the Pragma() statements at all.
CallBackProc(long phModule, long pType, long plParam), Bool, Pascal
All Windows API prototypes are this way, just because you’re converting from a C declaration doesn’t mean you actually use the C calling convention
http://attryde.com/clarion/cw_prototypes.htm