Using HWND of C++ in WPF(C#)

Question

Hi,

I have written some code to access my C++ DLL under my WPF application in C#.
In one of the Function of C++ has parameter HWND. I tried passing window handle by HwindowSource As well as windowinterophelper.

Both is not working in my case.

Plesae let me know how to pass HWND from WPF Appication in c#.

CODE:

C# ----->

 

[DllImport("dhnetsdk")]

        public static extern long CLIENT_RealPlay(long lLoginID, int nChannelID,IntPtr hWnd);

C++

CLIENT_API LONG CALL_METHOD CLIENT_RealPlay(LONG lLoginID, int nChannelID, HWND hWnd);

Please let me know what is the equalant conversion for DLL import in c#.

Thanks in advance,