Mouse & WM_INPUT problems

It's not clear what you're doing. What is 'm_pInput', what does its Update() function do, and how are you handling the mouse? If you handle individual messages, then nothing gets cleared, as such. So it would help to know exactly what you're doing. If the problem is that you poll for input twice in one frame, it's usually simplest just to stop doing that!

Hm, the problem was that the engine calls once per frame the Update() function which should check keystrokes, mouse and joysticks and then fire up action mapping. Update was not called by WM_INPUT but from the engine loop instead. The problem was what if, the update() block was allready processed and we were in the middle of the rendering and someone moves the mouse. Even if he left the mouse alone my variable still had the value of -1 for example. In this case it ment the following: if one moved mouse to the left (Relavtive X=-1) there IS no message, that says he does not move the mouse anymore, so the RelativeX is still -1. I did the following: if a WM_INPUT message gets processed it sums all X and Y into a buffer. And then when Input() gets called it copyies the BUFFER into RELATIVEXY and then clears the buffer. If no mouse movement available, mouse buffer is empty and RELATIVEXY will be empty by the next call on Update();