Custom Window Controls

[jamesleighe]

C++, Windows 8.1, Visual Studio

I need a knob like control for an amplifier program I'm making. How should I best go about this?

The knob would rotate as the user clicks on it and drags the mouse. However, how would I make the knob smoothly rotate? I assume I would need to rotate the bitmap image of the knob, but how should I best accomplish this?

Also, I will need sliders, much like the sliders you see on multi-band EQs. Should I just do a custom draw of a common slider control, or roll my own here as well?

Thanks allot!