logging on desktop

Question

Hello I have already stated a problem in a previous posting where I want to log the things and/or tasks a user execute on a PDA, especially the difficult thing is that i want the log the data directly on the PDA for example in a file. I know that it is nearly impossible because the .NET CF does not support any Trace or Debug-classes. At least I build a solution where the title of the window which the user currently works with will be logged in a file all 5 seconds. Unfortunately I do not have further or better solutions. :( Now i have a further scenario for which i want to develop a solution: I have a Web-Service which runs on a Desktop and a Mobile Web Client which consumes this Web-Service from a PDA. Now I want to log the tasks and/or events a user executes with the PDA on the Desktop by WLAN in a database or in a file. It should be a generic solution, so not only the tasks from a Windows Mobile Client which consumes a Web-Service should be logged but for any other Microsoft specific Web Application which consumes some application on a desktop should be a possibility available to log the events. What i meant with log the events is that I want to log the method-call (the name of the method) and the time when the method was called. An important aspect i have to consider is the performance. – This solution should not have such a negative impact on the performance. Hopefully someone could give me tipps or hints how i can solve this problem. Thanks in Advance. Yours sincerely, Patrick