DnsFlushResolverCache 清除windows DNS緩存

效果等同於ipconfig /flushdns 命令。
DnsFlushResolverCache 函數是在Dnsapi.dll導出，該函數沒有任何參數。MSDN中找不到他，看來是個Undocumented函數，函數原型：

BOOL WINAPI DnsFlushResolverCache(VOID);

 

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:

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