Hook or not ?

[Turingmachine]

I wonder if my mouse application working outside the client region, something like BgInfo (@sysinternals.com) should be provided with a hook ?

Thank you

[Igor Vartanov]

It should be, once the mouse has to be processed by your app even been inactive/background. Otherwise it might be not (http://msdn.microsoft.com/en-us/library/ms646262(VS.85).aspx).