Get A Window's Bounds By Its Handle

Question

I am trying to get the height and the width of the current active window.

[DllImport(\"user32.dll\", CharSet = CharSet.Auto, ExactSpelling = true)]
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Answer 1

Of course that code will not work. It has to be this way: GetWindowRect(handle, ref rect);. So, edit your GetWindowRect declaration. And Rectangle is just a wrapper of the native RECT. Rectangle and RECT has left, top, right and bottom fields that the Rectangle class changed to read-properties (Left, Top, Right, Bottom). Width is not equivalent to right and Height is not equivalent to bottom. Width is right-left and Height is bottom-top. Of course, RECT don't have these sort of properties. It's just a bare struct.

Creating RECT is an overkill. Rectangle is enough in .NET for native/unmanaged API that need it. You just have to pass it in the appropriate way.