title: Are we able to set opacity of the background image of a panel?
body: <p>As you know it is possible in WPF. But I have a project in Windows Forms but I don't want to struggle to move project into WPF. So is it possible in Windows Forms? (Unlike asked in another question, I don't ask transparency of a panel. I am asking "If I would use a background image", can I make it half transparent.)</p>