DDE.c File Reference

#include "DDE.h"
#include "ddeml.h"

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Functions
HDDEDATA CALLBACK	DdeCallback (UINT uType, UINT uFmt, HCONV hconv, HSZ hsz1, HSZ hsz2, HDDEDATA hdata, DWORD dwData1, DWORD dwData2)
BOOL	DDEIsOpen (void)
BOOL	DDEOpenConnection (char *strServeur, char *strTopic)
BOOL	DDECloseConnection (void)
BOOL	DDEExecute (char *szCommand, int TimeOut)
BOOL	DDERequest (char *szItem, int TimeOut, char *Result)
BOOL	DDEPoke (char *szItem, char *szData, int TimeOut)
Variables
static DWORD	idInst = 0
static HCONV	hConv = NULL
static BOOL	DDEInUse = FALSE

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Function Documentation

HDDEDATA CALLBACK DdeCallback	(	UINT	uType,
		UINT	uFmt,
		HCONV	hconv,
		HSZ	hsz1,
		HSZ	hsz2,
		HDDEDATA	hdata,
		DWORD	dwData1,
		DWORD	dwData2
	)

Definition at line 12 of file DDE.c.

Referenced by DDEOpenConnection().

{
    return 0;
}

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BOOL DDECloseConnection

(

void

)

Definition at line 66 of file DDE.c.

References DDEInUse, FALSE, hConv, idInst, NULL, and TRUE.

Referenced by _PARAMS().

{
        BOOL bOK=FALSE;

        if (DDEInUse)
        {
                DDEInUse=FALSE;
                DdeDisconnect(hConv);
                DdeUninitialize(idInst);
                idInst=0;
                hConv=NULL;
                bOK=TRUE;
        }
        else
        {
                bOK=FALSE;
        }
        return bOK;
}

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BOOL DDEExecute	(	char *	szCommand,
		int	TimeOut
	)

Definition at line 86 of file DDE.c.

References FALSE, hConv, idInst, L, NULL, and TRUE.

{
        BOOL bOK=TRUE;

    HDDEDATA hData = DdeCreateDataHandle(idInst, (LPBYTE)szCommand,
                               lstrlen(szCommand)+1, 0, NULL, CF_TEXT, 0);
    if (hData==NULL)
        {
                bOK=FALSE;        
    }
    else    
        {
                HDDEDATA ReturnValue=NULL;
                bOK=TRUE;
                if (TimeOut>0)
                {
                        TimeOut=TIMEOUT_ASYNC;
                }

                ReturnValue=DdeClientTransaction((LPBYTE)hData, 0xFFFFFFFF, hConv, 0L, 0,
                             XTYP_EXECUTE, TimeOut, NULL);
                
                if (!ReturnValue) bOK=FALSE;
    }
        return bOK;
}

BOOL DDEIsOpen

(

void

)

Definition at line 25 of file DDE.c.

References DDEInUse.

{
        return DDEInUse;
}

BOOL DDEOpenConnection	(	char *	strServeur,
		char *	strTopic
	)

Definition at line 30 of file DDE.c.

References DdeCallback(), DDEInUse, FALSE, hConv, idInst, NULL, TRUE, and UINT.

Referenced by _PARAMS().

{
        UINT iReturn=DMLERR_NO_ERROR;
        BOOL bOK=TRUE;
        
        if (DDEInUse)
        {
                bOK=FALSE;
        }
        else
        {
                iReturn = DdeInitialize(&idInst, (PFNCALLBACK)DdeCallback, 
                            APPCLASS_STANDARD | APPCMD_CLIENTONLY, 0 );
                if (iReturn!=DMLERR_NO_ERROR)
                {
                        bOK=FALSE;
                }
                else
                {
                        HSZ hszApp, hszTopic;
                        hszApp = DdeCreateStringHandle(idInst, strServeur, 0);
                        hszTopic = DdeCreateStringHandle(idInst, strTopic, 0);
                        hConv = DdeConnect(idInst, hszApp, hszTopic, NULL);
                        DdeFreeStringHandle(idInst, hszApp);
                        DdeFreeStringHandle(idInst, hszTopic);
                        if (hConv == NULL)
                        {
                                DdeUninitialize(idInst);
                                bOK=FALSE;
                        }
                        DDEInUse=TRUE;
                }
        }
    return bOK;
}

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BOOL DDEPoke	(	char *	szItem,
		char *	szData,
		int	TimeOut
	)

Definition at line 140 of file DDE.c.

References FALSE, hConv, idInst, NULL, and TRUE.

{
        BOOL bOK=TRUE;
        HDDEDATA ReturnValue=NULL;

    HSZ hszItem = DdeCreateStringHandle(idInst, szItem, 0);
        if ( TimeOut < 0 )
        {
                TimeOut=3000;
        }
        
        ReturnValue=DdeClientTransaction((LPBYTE)szData, (DWORD)(lstrlen(szData)+1),
                                                        hConv, hszItem, CF_TEXT,
                                                        XTYP_POKE, TimeOut, NULL);

        if (!ReturnValue) bOK=FALSE;
    if (!DdeFreeStringHandle(idInst, hszItem)) bOK=FALSE;

        return bOK;
}

BOOL DDERequest	(	char *	szItem,
		int	TimeOut,
		char *	Result
	)

Definition at line 113 of file DDE.c.

References FALSE, hConv, idInst, NULL, and TRUE.

{
        BOOL bOK=FALSE;
        HDDEDATA hData =NULL;

    HSZ hszItem = DdeCreateStringHandle(idInst, szItem, 0);

        if ( TimeOut < 0 )
        {
                TimeOut=3000;
        }
        
        hData = DdeClientTransaction(NULL,0,hConv,hszItem,CF_TEXT, 
                                 XTYP_REQUEST,TimeOut, NULL);
    if (hData==NULL)
    {
        bOK=FALSE;
    }
    else
    {
        DdeGetData(hData, (unsigned char *)Result, (DWORD)strlen(Result), 0);
                if ( DdeGetLastError(idInst) == DMLERR_NO_ERROR ) bOK=TRUE;
    }

        return bOK;
}

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Variable Documentation

BOOL DDEInUse = FALSE [static]

Definition at line 10 of file DDE.c.

Referenced by DDECloseConnection(), DDEIsOpen(), and DDEOpenConnection().

HCONV hConv = NULL [static]

Definition at line 9 of file DDE.c.

Referenced by DDECloseConnection(), DDEExecute(), DDEOpenConnection(), DDEPoke(), and DDERequest().

DWORD idInst = 0 [static]

Definition at line 8 of file DDE.c.

Referenced by DDECloseConnection(), DDEExecute(), DDEOpenConnection(), DDEPoke(), and DDERequest().

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