Windows Desktop Sharing Samples

Examples showing use of Windows Desktop Sharing.

Samples from MSDN

Taken from Writing a Desktop Sharing Application - Remote Desktop Services Blog (Alternate Link.

Useful Q&A found at Windows Desktop Sharing API - Remote Desktop Services Blog (Alternate Link)

Samples showing use of IRDPSRAPITransportStream

RdpDsViewer provides an example of a pluggable transport being used. The example only sends the data in-process, but the same could occur across the network.

One notable aspect is that calls to IRDPSRAPITransportStreamEvents must take place either during a call to a method of IRDPSRAPITransportStream or with the COM Context captured during a call to IRDPSRAPITransportStream (usually Open). Normal COM Marshalling is insufficient. The UI STA thread is unacceptable. Calls from the wrong thread will result in E_FAIL being returned by QueryInterface on a call to IRDPSRAPITransportStreamEvents.

Apparent semantics observed:

• Calls to IRDPSRAPITransportStream come from MTA worker thread run by RDP dll
• Calls to IRDPSRAPITransportStreamEvents
  • Succeed when on the IRDPSRAPITransportStream worker thread
  • Succeed when invoking the COM Context captured from the RDP Worker thread (which will not invoke back to the worker thread - but a new one)
  • Fail from the UI STA Thread
  • Fail from the ThreadPool
  • Fail from a new background STA Thread
  • Fail from a new background MTA Thread
• Reads are serialized
• Writes are concurrent, but must be delivered in order
• Close is asynchronous and may occur during a read or write (buffers can be freed while a read or write are pending)
• IRDPSRAPITransportStream.ReadBuffer PayloadSize represents the maximum number of bytes to read. PayloadSize should be set to the number of read bytes before calling IRDPSRAPITransportStreamEvents.OnReadCompleted.