Is HWND visible?

Question

Those darned users and their minimized windows.

In C#, if I have a window's HWND, is there a way to tell if it is visible on the desktop?

Answer 1

The GetWindowPlacement function returns a WINDOWPLACEMENT structure which has a field showCmd:

Specifies the current show state of the window.

The details of this read as though you would be setting the window state, but I suspect that this is because they've been copied from somewhere else and not updated.

Answer 2

There's the Visible property, but that checks the visible flag, it doesn't tell you whether the window is being covered by another window, or off the screen, etc.. That's a lot more tricky. Raymond Chen has some tips, though:

http://blogs.msdn.com/oldnewthing/archive/2003/09/02/54758.aspx

http://blogs.msdn.com/oldnewthing/archive/2003/08/29/54728.aspx

Answer 3

bool isHwndVisible = Control.FromHandle(handle).Visible