这是源代码：

[DllImport("ole32.dll")]
    public static extern void CoTaskMemFree(IntPtr ptr);

    [StructLayout(LayoutKind.Sequential,CharSet = CharSet.Auto)]
    private struct CREDUI_INFO
    {
        public int cbSize;
        public IntPtr hwndParent;
        public string pszMessageText;
        public string pszCaptionText;
        public IntPtr hbmBanner;
    }  


    [DllImport("credui.dll",CharSet = CharSet.Auto)]
    private static extern bool CredUnPackAuthenticationBuffer(int dwFlags,IntPtr pAuthBuffer,uint cbAuthBuffer,StringBuilder pszUserName,ref int pcchMaxUserName,StringBuilder pszDomainName,ref int pcchMaxDomainame,StringBuilder pszPassword,ref int pcchMaxPassword);

    [DllImport("credui.dll",CharSet = CharSet.Auto)]
    private static extern int CredUIPromptForWindowsCredentials(ref CREDUI_INFO notUsedHere,int authError,ref uint authPackage,IntPtr InAuthBuffer,uint InAuthBufferSize,out IntPtr refOutAuthBuffer,out uint refOutAuthBufferSize,ref bool fSave,int flags);



    public static void GetCredentialsVistaAndUp(string serverName,out NetworkCredential networkCredential)
    {
        CREDUI_INFO credui = new CREDUI_INFO();
        credui.pszCaptionText = "Please enter the credentails for " + serverName;
        credui.pszMessageText = "DisplayedMessage";
        credui.cbSize = Marshal.SizeOf(credui);
        uint authPackage = 0;
        IntPtr outCredBuffer = new IntPtr();
        uint outCredSize;
        bool save = false;
        int result = CredUIPromptForWindowsCredentials(ref credui,ref authPackage,IntPtr.Zero,out outCredBuffer,out outCredSize,ref save,1 /* Generic */);

        var usernameBuf = new StringBuilder(100);
        var passwordBuf  = new StringBuilder(100);
        var domainBuf = new StringBuilder(100);

        int maxUserName = 100;
        int maxDomain = 100;
        int maxPassword = 100;
        if (result == 0)
        {
            if (CredUnPackAuthenticationBuffer(0,outCredBuffer,outCredSize,usernameBuf,ref maxUserName,domainBuf,ref maxDomain,passwordBuf,ref maxPassword))
            {
                //TODO: ms documentation says we should call this but i can't get it to work
                //SecureZeroMem(outCredBuffer,outCredSize);

                //clear the memory allocated by CredUIPromptForWindowsCredentials 
                CoTaskMemFree(outCredBuffer);
                networkCredential = new NetworkCredential()
                                        {
                                            UserName = usernameBuf.ToString(),Password = passwordBuf.ToString(),Domain = domainBuf.ToString()
                                        };
                return;
            }
        }

        networkCredential = null;
    }

我仍然需要找出精细的细节,例如如何记住输入的最后一个凭据等…

但主要工作.