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
I thought I had this solved when I looked here a few weeks ago and noticed the answer about using a transparent background but it isn’t quite good enough because it prevents the button from being highlighted when pressed. Also, setting the style to Widget.Holo.Button.Borderless isn’t appropriate because it makes the button boundaries to big. … Read more
To clear some confusion: This is done in 2 steps: Setting the button background attribute to android:attr/selectableItemBackground creates you a button with feedback but no background. android:background=”?android:attr/selectableItemBackground” The line to divide the borderless button from the rest of you layout is done by a view with the background android:attr/dividerVertical android:background=”?android:attr/dividerVertical” For a better understanding here … Read more