DnsFlushResolverCache 清除windows DNS缓存

效果等同于ipconfig /flushdns 命令。
DnsFlushResolverCache 函数是在Dnsapi.dll导出，该函数没有任何参数。MSDN中找不到他，看来是个Undocumented函数，函数原型：

BOOL WINAPI DnsFlushResolverCache(VOID);

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BOOL __stdcall DnsFlushResolverCache()  {      BOOL bRet = FALSE;          typedef BOOL (WINAPI *PfuncDnsFlushResolverCache)(VOID);      HMODULE hDnsModule = LoadLibrary( _T("dnsapi.dll") );      if ( hDnsModule != NULL )       {          PfuncDnsFlushResolverCache pFlushFun = GetProcAddress( hDnsModule, "DnsFlushResolverCache" );          if ( pFlushFun != NULL )          {              pFlushFun();              bRet = TRUE;          }              FreeLibrary( hDnsModule );      }          return bRet;  }

　　

 

vb6 申明:

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1	Private Declare Function DnsFlushResolverCache Lib "dnsapi.dll" () As Long