WinCC generates alarms in Runtime through displaing messages

in Message Window and signalling by sound from Global Script:

#include "apdefap.h"

int gscAction( void )

{

#pragma code("Winmm.dll");

VOID WINAPI PlaySoundA (char* pszSound, char* hmode, DWORD dwFlag);

#pragma code ();

if ( (GetTagByte("status_z14")&0x2) || (GetTagByte("status_z15")&0x2))

PlaySoundA ("c:\\WINDOWS\\Media\\ding.WAV", NULL, 1);

return 0;

}

[trigger of action : cyclic 5s.]

What should I do to turn off the sound:

Single message is acknowledged, bit is still set (e.g. 0x2),

but sound shouldn’t being playing.

Usage acknowledgment tag is not permitted. It should be do by other way.