HookProc param - null

Question

Hello, I've made a mouse low level hook and it works fine except one problem: the procedure's param.

here's my code: http://pastebin.com/X2198UTb

My HookProc located in the middle of the code under my comment.

Is it a problem or it should be like that? if it should be like that - how can I know which window should get the right click? /// I added a condition to activate the event - right click.

Answer 1

This shouldn't even work at all. If you try the same thing (using LoadLibrary("User32") and a thread id of 0) in a pure native app, it will only work for a short while.

Use of a global hook requires a native (no C#) DLL. This is far more complicated than it might seem, especially if you want it to work on 64-bit Windows where you need both a 32- and 64-bit injection DLL as well as 32- and 64-bit injection processes.

Answer 2

Your code is quite confusing because of the fact that you declared the WH_MOUSE constant to have the value 14. WH_MOUSE actually has the value 7, and 14 is the value of WH_MOUSE_LL (and yes I know you wrote "low level" in your question).

But then you go on by using the WH_MOUSE related types. Specifically, the hook procedure of a WH_MOUSE_LL hook receives a MSLLHOOKSTRUCT structure, not the MOUSEHOOKSTRUCT you're using.

Also, as Hans and Tergiver has hinted, you should pass in the module handle of your own code, not User32.dll. Try using Marshal.GetHINSTANCE(typeof(globalMouse).Module).