请教：有没有人做过上位机通过WINCC控件做外部声音报警？请指教一二。

在全局脚本里面新建一个循环的东东，可以设置 2s，代码如下

#include "apdefap.h"

int gscAction( void )
{
MSG_RTDATA_STRUCT mRT;
int i;
char* pszToken;
//Now is my code
#pragma code("Winmm.dll")
BOOL WINAPI sndPlaySoundA(char* szWave,DWORD dwFlag);
#pragma code()
DWORD SND_ASYNC=0x0001;
DWORD SND_LOOP=0x0008;

DWORD alarmsum,alarmunack;
LPCMN_ERROR errorunack,errorsum;
#pragma code("msrtcli.dll")
#pragma code()
LPDWORD lpdwServiceID;
MSG_SERVICE_NOTIFY_PROC lpfnNotifyProc;
LPMSG_FILTER_STRUCT lpMsgFilter;
DWORD dwNotifyMask;
LPVOID lpvUser;
LPCMN_ERROR lpError;
BOOL n1;

n1=MSRTGetMsgQuit(&alarmunack,errorunack);
SetTagDWord("number",alarmunack);

MSRTGetMsgActual(&alarmsum,errorsum);
SetTagDWord("sum",alarmsum);

if (alarmsum==0)
sndPlaySoundA(NULL,SND_ASYNC);

else
{
if (alarmunack>0)
sndPlaySoundA("C:\\Program Files\\Windows NT\\Pinball\\SOUND36.WAV",SND_ASYNCSND_LOOP);
else
sndPlaySoundA(NULL,SND_ASYNC);

//sndPlaySoundA("C:\\windows\\media\\office97\\laser.wav",SND_ASYNCSND_LOOP);


}

return 1;
}