How should I understand this documentation: http://msdn.microsoft.com/en-us/library/dd757116%28v=VS.85%29.aspx
Can I only use 4 buttons and 1 analog stick? I've got a gamepad with 12 buttons, 2 analog joysticks and one "steering cross" (POV hat?). How many of these buttons can I use with winmm?
If you need more axis than are supported by winmm, consider DirectInput.
However, the page you linked clearly states that up to 32 buttons and 6 axes (3 2-D analog sticks) are supported by winmm. Looks like your gamepad will max out on axes, using all 6, and also use 12 out of 32 buttons.