CSliderCtrl OwnerDraw

Slider controls don't support owner draw.  There's nothing to explain: the control just doesn't do it.

.B ekiM

What is your suggestion?

Sorry, I didn't see that you asked a multi-part question.

You have three choices:

1) Subclass the control and handle WM_PAINT yourself. If you need to paint some easy adornment, or some small extra shape, this is fine. Call the control's OnPaint() handler, and let it paint the control. Then, paint over what the control painted. The control double-buffers everything it paints, which means that if your painting routine is slow, you'll end up seeing flashing or flickering--especially while the user hot-tracks the control. If you

2) Subclass the control and completely paint the control yourself. This is lots more work than 1), but gives you far more control over exactly the way the control will look. You can draw any part of the control without worrying about ligning up with the way the control draws under all circumstances on every system.

3) Find a 3rd-party control that gives source code or has better provisions for owner draw.

.B ekiM

It is the first time I have to do that, so what is the exact procedures for your choice 2? It's fine to subclass the control but after, what should I override and how to invoke the custom drawing and where?

I have successfully drawn on the control, but the thumb have it's default RECT. How do I change this rect to a better one. There is only the member GetThumbRect().

You can draw in whatever rect you like: I don't know how you would define "better" for what you want to draw for the thumb. You don't have to draw in the rect returned by GetThumbRect().

.B ekiM

I have to define my new thumb, and when the left mouse button is down it should track with it, but actually the thumb seems to have kept his old rect. The result is that when I want to track it I must click on a tiny area instead of my new bitmap.