File : gnatcom-events-event_object.ads


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--      GNATCOM - Ada 95 COM/DCOM/COM+ Development Framework and Tools      --
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with GNATCOM.Types;
with GNATCOM.Create.COM_Interface;
with Interfaces.C;

package GNATCOM.Events.Event_Object is

   type Event_Type is tagged null record;
   type Event_Pointer is access all Event_Type'Class;
   --  Allows association of an Ada object with a created
   --  Event_Object. The associated object is passed in
   --  to the call back Invoke_Function

   type Invoke_Function is access
     procedure (dispidMember : in Interfaces.C.long;
                wFlags       : in Interfaces.C.unsigned_short;
                pdispparams  : in GNATCOM.Types.Pointer_To_DISPPARAMS;
                Event_Object : in Event_Pointer);
   --  Definition of the call back function

   function Create (Invoke       : Invoke_Function;
                    Event_IID    : GNATCOM.Types.GUID;
                    Event_Object : Event_Pointer := null)
     return GNATCOM.Create.COM_Interface.Pointer_To_COM_Interface_Type;
   --  Creates a COM object that implements IDispatch and calls the
   --  call back function to handle IDispatch invokes
end GNATCOM.Events.Event_Object;