136 lines
3.4 KiB
C++
136 lines
3.4 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1993.
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//
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// File: DdeChC.cxx
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//
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// Contents: CDdeChannelControl implementation for DDE. This
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// implementation requires no instance data, therefore it is
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// intended to be static.
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//
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// Functions:
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//
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// History: 08-May-94 Johann Posch (johannp) Created
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// 10-May-94 KevinRo Made simpler and commented
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//
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//--------------------------------------------------------------------------
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#ifndef __DDECHC_HXX__
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#define __DDECHC_HXX__
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class CDdeObject;
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//
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// The following are the possible callbacks that would be supported by
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// the CDdeObject
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//
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typedef enum
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{
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DDE_DISP_SENDONDATACHANGE = 1,
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DDE_DISP_OLECALLBACK = 2 ,
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DDE_DISP_SRVRWNDPROC = 3 ,
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DDE_DISP_DOCWNDPROC = 4
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} DDE_DISPATCH_FUNC;
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//
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// The following defines a base class for the OLE 1.0 support
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//
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typedef struct tagOLE1DISPATCHDATA
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{
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DDE_DISPATCH_FUNC wDispFunc;
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}OLE1DISPATCHDATA, *POLE1DISPATCHDATA;
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//
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// The following structure is used by OLE 1.0 server support code
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//
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typedef struct tagDDEDISPATCHDATA : public CPrivAlloc, public OLE1DISPATCHDATA
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{
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CDdeObject *pCDdeObject;
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UINT iArg;
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} DDEDISPATCHDATA, *PDDEDISPATCHDATA;
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//
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// The following structure is used by the OLE 1.0 client support code
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// to dispatch incoming calls to Execute from the server window.
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//
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typedef struct tagSRVRDISPATCHDATA : public OLE1DISPATCHDATA,public CPrivAlloc
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{
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HWND hwnd;
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HANDLE hData;
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HWND wParam;
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LPSRVR lpsrvr;
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} SRVRDISPATCHDATA, *PSRVRDISPATCHDATA;
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INTERNAL SrvrDispatchIncomingCall(PSRVRDISPATCHDATA psdd);
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//
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// The following structure is used by the OLE 1.0 client support code
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// to dispatch incoming calls to a document window
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//
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typedef struct tagDOCDISPATCHDATA : public OLE1DISPATCHDATA,public CPrivAlloc
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{
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HWND hwnd;
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ULONG msg;
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WPARAM wParam;
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LPARAM lParam;
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HANDLE hdata; // If already determined, these two hold
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ATOM aItem; // valid data. All depends on the message
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LPCLIENT lpclient;
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} DOCDISPATCHDATA, *PDOCDISPATCHDATA;
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INTERNAL DocDispatchIncomingCall(PDOCDISPATCHDATA psdd);
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//
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// DDECALLDATA is all the information needed to transmit the outbound call
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// to the server. Since this DDE channel uses PostMessage, the members
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// should look amazingly alot like the parameters to PostMessage.
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//
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// The hwndCli is used for setting callback information.
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// fInitialSend is used by IChannelControl::Transmit().
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//
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typedef struct tagDDECALLDATA : public CPrivAlloc
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{
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HWND hwndSvr; // Server DDE window
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WORD wMsg; // Post parameters
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WPARAM wParam;
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LPARAM lParam;
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HWND hwndCli; // Handle to client side window
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BOOL fInitialSend; // True if the first post has been made
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// already.
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} DDECALLDATA, *PDDECALLDATA;
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class CDdeChannelControl : public IChannelControl
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{
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public:
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// IUnknown methods
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STDMETHOD (QueryInterface) ( REFIID riid, LPVOID FAR* ppvObj);
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STDMETHOD_(ULONG,AddRef) ( void );
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STDMETHOD_(ULONG,Release) ( void );
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// IChannelControl
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STDMETHOD (DispatchCall)( PDISPATCHDATA );
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STDMETHOD (OnEvent) ( PCALLDATA );
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STDMETHOD (TransmitCall)( PCALLDATA );
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};
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//
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// All threads can use a single instance of this class. Therefore, we
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// provide the following global variable
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//
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extern CDdeChannelControl g_CDdeChannelControl;
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#endif // __DDECHC__HXX__
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