Yes, Aero lies about the window size returned by GetWindowRect(). It is a rather important appcompat hack, without it far too many programs would have a client area that’s too small. Unfortunately there’s neither an API call nor a manifest entry that can be used to turn off the lie. The only way is to … Read more
I’m guessing there aren’t any special messages here; Aero is likely just using the plain Win32 APIs – ShowWindow(SW_MAXIMIZE) and similar. The thing to uderstand with the SC_ messages are that those are requests from a menu asking the window to resize/restore/etc itself, but that is not the only mechanism for changing the windows’s size. … Read more
Easiest Full Solution Hello, The following solution fixes all of the issues detailed in your question in the simplest manner possible, and works on Windows 10 using WPF and the latest version of the C# language and .NET framework. This is as of 3/15/2017. Please let me know if it stops working. Step 1: To … Read more
Since GDI forms on Delphi don’t support alpha channels (unless using alpha layered windows, which might not be suitable), commonly the black color will be taken as the transparent one, unless the component supports alpha channels. tl;dr Just use your TTransparentCanvas class, .Rectangle(0,0,Width+1,Height+1,222), using the color obtained with DwmGetColorizationColor that you could blend with a … Read more
Seems to work OK for me. With the lack of a full code example I’m assuming you’ve got your compositing mode wrong. public void RenderGdiPlus() { List<string> colors = new List<string>(new string[] { “000000”, “ff0000”, “00ff00”, “0000ff”, “ffffff” }); List<string> alphas = new List<string>(new string[] { “00”, “01”, “40”, “80”, “c0”, “fe”, “ff” }); Bitmap … Read more
I recently needed to do this to a custom, resizable ResizeMode = CanResizeWithGrip WPF window with no window decorations (no title bar and buttons). I used DragMove() to move the window, and when It is maximized by AeroSnap, the window becomes unmovable and hence locked in place. I tried Barn Monkey’s solution, which partially worked, … Read more
Skype cheats it, and has a little sliver along the top of their window; where they can draw it. You can see it with Process Explorer to SpyXX: See also MSDN: Custom Window Frame Using DWM
Colorization color != the base color chosen. It’s misleading, I know. But I’m confused. The image you borrowed was from my post entitled “Retrieving Aero Glass base color for opaque surface rendering“. Is this not what you want to do? I also indicated in the post the registry location in which all the color information … Read more
After using Spy++ to inspect Steam’s window (its window styles, how it replies to window messages) and trying to match everything it does, combined with the DWMAPI calls from this C# borderless window behavior, I believe I figured it out. To hide the window’s border, handle the WM_NCCALCSIZE message in your WindowProc: case WM_NCCALCSIZE: { … Read more
What are the problems with settings bounds on non-resizable containers? Suppose you adjust the bounds to look good on your platform. Suppose the user’s platform has a font with different, say larger, FontMetrics. This example is somewhat contrived, but you get the idea. If you change the bounds of a non-resizable container, be sure any … Read more