XPLMUnregisterDrawCallback

XPLMUnregisterDrawCallback

XPLM_API int                  XPLMUnregisterDrawCallback(
                                   XPLMDrawCallback_f   inCallback,    
                                   XPLMDrawingPhase     inPhase,    
                                   int                  inWantsBefore,    
                                   void *               inRefcon);    

This routine unregisters a draw callback. You must unregister a callback for each time you register a callback if you have registered it multiple times with different refcons. The routine returns 1 if it can find the callback to unregister, 0 otherwise.