sample10clt.c

labwindows 源码 CVI的 DDE数据交换源代码 这是CVI和VB2种平台之间的数据交互

//此程序包含了发送给客户的所有数据


#include <userint.h>
#include <ddesupp.h>
#include "sample10svr.h"
#include "sample10dde.h"

int CVICALLBACK CltCallback (unsigned handle, char *topicName,
                       char *itemName, int xType, int dataFmt,
                       int dataSize, void *dataPtr,
                       void *callbackData);


//命令串回调函数

int CVICALLBACK ClientCtrlsCallback(int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    char    buffer[100]={0};
    static  int handle=-1;

    if (event==EVENT_COMMIT) {
        switch (control) {
            case SERVER_SENDCOMMAND:
                if (handle==-1)
                    break;
                GetCtrlVal (panel, SERVER_COMMANDSTRING, buffer);
                if (buffer[0]!=0)
                    ClientDDEExecute (handle, buffer, 0);
                break;
            case SERVER_DISCONNECTVBSERVER:
                if (handle!=-1) {
                    DisconnectFromDDEServer (handle);
                    handle = -1;
                }
                break;
            case SERVER_CONNECTVBSERVER:
                if (handle==-1)
                    ConnectToDDEServer (&handle, "VBDDE", "System", CltCallback, 0);
                break;
        }
    }
    return FALSE;
}

 //  DDE客户回调函数，此函数接收和处理由 VB服务器发送的信息

int CVICALLBACK CltCallback (unsigned handle, char *topicName,
                       char *itemName, int xType, int dataFmt,
                       int dataSize, void *dataPtr,
                       void *callbackData)
{
    return FALSE;
}