aero

I have ran into what I consider to be a progress bar bug on Windows 7. To demonstrate the bug I created a WinForm application with a button and a progress bar. In the button's 'on-click' handle I have the following code. private void buttonGo_Click(object sender, EventArgs e) { this.progressBar.Minimum = 0; this.progressBar.Maximum = 100; this.buttonGo.Text = "Busy"; this.buttonGo.Update(); for (int i = 0; i <= 100; ++i) { this.progressBar.Value = i; this.Update(); System.Threading.Thread.Sleep(10); } this.buttonGo.Text = "Ready"; } The expected behavior is for the progress bar to advance to

Using the undocumented SetWindowCompositionAttribute API on Windows 10, it's possible to enable glass for a window. The glass is white or clear, as seen in this screenshot: However, the Windows 10 Start menu and the notification center, which both also uses glass, both blend with the accent colour, like so: How does it do it? Investigations The accent colour in the following examples is a light purple - here's a screenshot from the Settings app: The AccentPolicy structure defined in this example code has accent state, flags and gradient color fields: AccentPolicy = packed record AccentState:

Using GDI+ to draw various colors: brush = new SolidBrush(color); graphics.FillRectangle(brush, x, y, width, height); You'll notice that no opaque color shows properly on glass: How do i draw solid colors on glass? You'll also notice that a fully opaque color is handled differently depending on what color it is: opaque black: fully transparent opaque color: partially transparent opaque white: fully opaque Can anyone point me to the documentation on the desktop compositor that explains how different colors are handled? Update 3 You'll also notice that FillRectangle behaves differently than

I'm trying to position my form precisely above the taskbar. Unfortunately my efforts are hampered by the fact that this.Height on my form returns a value which is 10 pixels smaller than the actual form (with all the borders, title bar, etc). I'm running Windows 7 with Aero. When Aero is turned off (and the borders are thinner), all works as expected. The form border style is FixedSingle . I don't want to implement Aero-specific hacks. What can I do to get the correct height? Yes, Aero lies about the window size returned by GetWindowRect(). It is a rather important appcompat hack, without it