Question

I have a FlowLayoutPanel with AutoScroll = true
I need to detect the movement of the mouse on the scrollbar when the scrollbar is visible.

The MouseMove event of the FlowLayoutPanel does not capture events pertaining to the scrollbar.

Is there any way to hook on to the mouse move of the scrollbar?

Answer 1

class MyFlowLayoutPanel : FlowLayoutPanel
{
    const int WM_NCMOUSEMOVE = 0x00A0;

    protected override void WndProc(ref Message m)
    {
        if( m.Msg == WM_NCMOUSEMOVE )
        {
            Console.WriteLine("MouseOverScrollbar");
        }

        base.WndProc(ref m);
    }
}