Passing impersonation token on a Managed Thread to an Unmanaged Thread

Question

I have a case where a VB.Net winforms app needs to play WMV files from across the network. The user running the app cannot be given direct access to the network share. Through impersonation, I can see that the files exist (without impersonation, File.Exists returns false for the files on the network share). When I then try to load the file into a Windows Media Player control, the control just remains black. I have deduced that when the Windows Media Player control is loaded into memory, it is running on a separate unmanaged thread than the .Net managed thread. Is there any way to pass that security token from the managed thread to the unmanaged thread? Am I missing something completely? JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

Have you tried using SetThreadPrincipal method off AppDomain? Example: IPrinicipal userPrincipal = new MyCustomPrincipal(); AppDomain currentDomain = AppDomain.CurrentDomain; currentDomain.SetThreadPrincipal(userPrincipal); You mentioned in your question, that WMV seems to run unmanaged, so if that premise is correct, this really shouldn't work (see my second answer).