/* **********************************************************
   ddelib.h - Dynamic Data Exchange Dynamic Link Library Include File

   Copyright Horizon Technologies Inc. 1990.  All Rights Reserved.

  ***revision history***
1 DDELIB.H 24-Jan-90,10:36:00,`JMH' Initial version
2 DDELIB.H 29-Jan-90,11:02:52,`JMH' Semi-stable version
  ***revision history***
********************************************************** */

/* Message values sent to callback functions */
#define DDE_INITIATE		0
#define DDE_TERMINATE		1
#define DDE_ADVISE		2
#define DDE_UNADVISE		3
#define DDE_ACK 		4
#define DDE_DATA		5
#define DDE_REQUEST		6
#define DDE_POKE		7
#define DDE_EXECUTE		8

/* Application return codes for bAppReturnCode in DDEACK structure */
#define DDE_OK			0
#define DDE_NACK		1
#define DDE_BADHANDLE		2
#define DDE_BADSTATE		3
#define DDE_MEMORY		4
#define DDE_BADITEM		5
#define DDE_BADTOPIC		6

#define MAX_ITEM_LEN		32

typedef WORD (FAR PASCAL *DDECALLBACK) (HWND, unsigned, LPSTR, HANDLE);

HWND FAR PASCAL DDEInitiate (HWND, LPSTR, LPSTR);
WORD FAR PASCAL DDEAdvise (HWND, LPSTR, DDEADVISE FAR *, DDECALLBACK);
WORD FAR PASCAL DDEUnadvise (HWND, LPSTR);
WORD FAR PASCAL DDERequest (HWND, LPSTR, WORD, DDECALLBACK);
WORD FAR PASCAL DDEPoke (HWND, LPSTR, HANDLE);
WORD FAR PASCAL DDEExecute (HWND, HANDLE);
WORD FAR PASCAL DDETerminate (HWND);

HWND FAR PASCAL DDERegisterTopic (HWND, LPSTR, LPSTR, DDECALLBACK);
WORD FAR PASCAL DDESendData (HWND, unsigned, LPSTR, HANDLE);
WORD FAR PASCAL DDEUnregisterTopic (HWND);