GetGadget()
USAGE
Gadget = (struct Gadget *) GetGadget(Window, GadgetID)
FUNCTION
Returns a pointer to the gadget requested with the GadgetID. If there is a
non-system gadget in the window's gadget list with this ID, it will be
returned. If not, NULL is returned.
This is useful for getting access to gadgets without having to have their
names hard coded into the program.
INPUTS
Window = Pointer to the window the gadget resides in.
GadgetID = Short integer ID of the requested gadget.
RESULT
Gadget = Pointer to the requested Gadget, NULL if it doesn't exist.