Button on non-white background

[lightstep]

Hi,

I want to show a button with FlatStyle set to System on the black background. The problem is that there is a gray background at the button edges (button screenshot is attached).
Please advice how to get rid of it.

[boudino]

It looks like your system is Vista, so FlatStyle=System makes the button looks like Vista's button. If think it is right. Try to set the style to Flat, or use WPF and provide completely you own styling.