RDP Virtual Chanel file transfer

We already have a custom remote desktop client based on Terminal Services Client ActiveX control. (something like this [login to view URL]) I need a way to send a file and a command from server to client. This can be done with a virtual channel or maybe with Addin for RDP. We need a server side dll to call from our software a procedure with parameter of file path and the procedure will send it to client. and a client side dll that can receive a file from the server side to the client side over the virtual channel. Here is an example that maybe can help but works with [login to view URL]: [login to view URL] To sum the project up, we connected to the server with a Terminal Services Client ActiveX control and we need to send a file from server to client.