srchProc
#include <Quickdraw.h>
typedef struct { Size Offset Description
SProcHndl nxtSrch; 4 0 Handle to next SProcRec
typedef SProcRec *SProcPtr;
typedef SProcRec **SProcHndl;
Notes: Applications can all have their own search procedures, yet share the same
gDevice. The search procedures form the elements in a linked list that
starts in the device port's gdSearchProc field. The search procedures list
can be any length and each search procedure on the list gets a chance to act
or not.