ptrOpenedServer = WTSOpenServer(ServerName)

    static extern IntPtr WTSOpenServer([MarshalAs(UnmanagedType.LPStr)] String pServerName);

        IntPtr server = WTSOpenServer(Name);

public static extern IntPtr WTSOpenServer(string pServerName);

$wtsOpen = add-type -MemberDefinition $wtsopensig -name PSWTSOpenServer -Namespace GetLoggedOnUsers -PassThru

$server = $wtsOpen::WTSOpenServer($server)

     Private Shared Function WTSOpenServer(ByVal pServerName As String) As IntPtr

        ptrOpenedServer = WTSOpenServer(ServerName)

For the server handle (first parameter), please use WTS_CURRENT_SERVER_HANDLE if the code is running on the same machine whose handle you intend to pass. Otherwise, use WTSOpenServer as shown in the sample code.

        ptrOpenedServer = WTSOpenServer(ServerName)

static extern IntPtr WTSOpenServer(string pServerName);

Private Shared Function WTSOpenServer(ByVal pServerName As String) As IntPtr

When you are finished with the handle returned by WTSOpenServer, call the WTSCloseServer function to close it.

/// <param name="hServer">Handle to a terminal server. Specify a handle opened by the WTSOpenServer function,

    /// <param name="hServer">Handle to a terminal server. Specify a handle opened by the WTSOpenServer function,