When you click a window in your taskbar (Windows users) it will retain it's last state - maximised or normal scalable window. I'm trying to do a similar thing, but programatically and without the window gaining focus (eg. becoming foreground and disturbing my current activity in another window).
Can I do that? Current window state can be obtained using this API call:
//Empty Window placement structure WinDefExt.WINDOWPLACEMENT placement = new WinDefExt.WINDOWPLACEMENT(); //winapi call to external User32.dll file UserExt.GetWindowPlacement(hwnd, placement); //showCmd should be equal to one of the SW_ constants (here: https://msdn.microsoft.com/en-us/library/windows/desktop/ms633548%28v=vs.85%29.aspx) placement.showCmd;