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c#winformswinapivisual-styles

Problems drawing Windows 10 Caption Buttons

I'm having problems drawing Windows 10 themed Window Caption Buttons using the VisualStyleRenderer class.

My problem is that I can't figure out which Theme Class to use. I tried Window and CompositedWindow::Window, however, none of those actually contain Windows 10 themed buttons as I found out using this msstyle editor.

Which Theme Class contains Windows 10 themed Caption Buttons?

How it looks now:

Windows 7 themed button

How I want it to look:

Windows 10 themed caption buttons

How I'm drawing the buttons:

protected override void OnPaint(PaintEventArgs e)
{
    VisualStyleRenderer renderer = new VisualStyleRenderer("Window", 18 /*WP_CLOSEBUTTON*/, 1 /*CBS_NORMAL*/);
    var size = renderer.GetPartSize(e.Graphics, ThemeSizeType.True);
    renderer.DrawBackground(e.Graphics, new System.Drawing.Rectangle(10, 10, size.Width, size.Height));
}
Solution

  • The problem is the Window class you are using. This is the legacy GDI Window that is composited without a composition engine.

    The DWM Desktop Window Manager composites every window, as every window is just a DirectX surface. You need to use the DWMWindow class as opposed to the Window class from aero.msstyles.

    enter image description here

    Notice how there are multiple glyphs for each DPI: 96, 120, 144, etc.