学步园

在开发来电防火墙或来电大头贴时，首先就是要截获来电，然后再加以分析，截获来电的方法一般就是用TAPI提供的api函数，这些函数在tapi.h下．
１．初始化线路，并打开线路
  DWORD            lineHandleCount;
         HLINE             *lineHandles;
         HLINEAPP          lineApp;

if(lineInitialize(&lineApp,theApp.m_hInstance,(LINECALLBACK)LineCallback,L"Video",&lineHandleCount)==0)
 {
     lineHandles = new HLINE[lineHandleCount];

        for(DWORD i = 0; i < lineHandleCount; i++)
        {

            int rc;
            DWORD ver;
            LINEEXTENSIONID extensionID;

            if( lineNegotiateAPIVersion( lineApp, i, 0x00010000, 0x00020000, &ver, &extensionID ) == 0 )
            {
               rc = lineOpen( lineApp,i,&lineHandles[ i ],ver,0,(DWORD)0,LINECALLPRIVILEGE_MONITOR|LINECALLPRIVILEGE_OWNER,LINEMEDIAMODE_INTERACTIVEVOICE,NULL);
            }
        }
 }

２.编写回调函数，在这个函数里实现功能
VOID CALLBACK LineCallback(DWORD hDevice, DWORD dwMsg, DWORD dwCallbackInstance, DWORD dwParam1, DWORD dwParam2, DWORD dwParam3)
{
　//dwMsg是线路消息
   //dwParam1,dwParam2是具体的事件
}

3.当结束程序时，关闭线路
for ( DWORD i=0; i<lineHandleCount; i++ )
        lineClose( lineHandles[i]);

        delete[] lineHandles;
        lineShutdown( lineApp );