result = DoGadgetMethodA( Gadget, Window, Requester, Message )
D0 A0 A1 A2 A3
ULONG DoGadgetMethodA(
struct Gadget *,
struct Window *,
result - DoGadgetMethod( Gadget, Window, Requester, MethodID, ...)
ULONG DoGadgetMethod(
struct Gadget *,
struct Window *,
struct Requester *, ULONG, ... );