找不到Wlanapi.dll入口点异常

Question

当我尝试调用wlanapi.dll的WlanOpenHandle方法时，代码抛出EntryPointNotFoundException。

C＃：

[DllImport("wlanapi.dll", SetLastError = true)]
public static extern uint WlanOpenHandle([In] UInt32 clientVersion, [In, Out] IntPtr pReserved, [Out] out UInt32 negotiatedVersion, [Out] out IntPtr clientHandle);

C＃：

uint dwClientVersion = 1;
IntPtr pReserved = IntPtr.Zero;
uint pdwNegotiatedVersion;
IntPtr phClientHandle;

var result = WlanOpenHandle(dwClientVersion, pReserved, out pdwNegotiatedVersion, out phClientHandle);

web site表示存在切入点。缺少的部分是什么？