Hi I'm using a Screen Capture Source Filter in WME to capture screen activity. I need to be able to configure the various properties of this filter in code but I'm having trouble getting a reference to the source filter from WME. I've been trying to call the GetSourcePlugin() method (after I call prepare) on the video source and then cast the ComObject, I get back, to the source filter interface (I imported a typelib for the source filter). However, I haven't been able to cast the ComObject to the plugin interface. Can anyone tell me what the GetSourcePlugin() method is supposed to return? Is that even the right method for this task? I've tried adding the Screen Capture Source Filter as a device and I've also tried adding it as a file source as discussed here: http://groups.google.com/group/microsoft.public.windowsmedia.sdk/browse_thread/thread/78fd6f1d83c77fed/3bb4c81f230bb294?lnk=gst&q=Custom+Capture+Filter+#3bb4c81f230bb294 but either way, I cant get a reference to the source plugin. Is it possible that the GetSourcePlugin() returns some kind of wrapper, IFileSource or IDeviceSource (those interfaces are just made up) for the source plugin?
