Question

this might be a very global question but here we go:

I was wondering how I could make a trackbar like Virtualbox.
They have a trackbar that have custom colors at the bottom to show if you’ve assigned too much RAM to your virtual system.
Now my question is: How can I give my trackbar custom colors?
I have read something about e.graphics etc. and overriding other functions, but I can’t seem to find any information about this ):.

If you know what I mean and have sources to good tutorials and/or examples that would be awesome! Because I really don’t know where to look anymore :(.

I am programming in C#, WinForms.

Answer 1

As Hans mentioned the standard trackbar is pretty limiting. You can change the background color through TrackBar.BackColor property. Otherwise you will have to create a custom control and override the OnPaint method:

partial class MyTrackBar : System.Windows.Forms.TrackBar
{       
    protected override void  OnPaint(System.Windows.Forms.PaintEventArgs e)
    {
        e.Graphics.FillRectangle([Brush color], ClientRectangle);
    }
}

Third option is to use a trackbar already created. Like free CodeProject trackbar or commercial Devexpress one.