DnsFlushResolverCache 清除windows DNS缓存

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);

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