The client area is the area which may be drawn on by the programmer,
excluding title bar, border, scrollbars, etc.
Note that if this window is a top-level one and it is currently minimized, the
return size is empty (both width and height are 0).
The client area is the area which may be drawn on by the programmer,
excluding title bar, border, scrollbars, etc.
Note that if this window is a top-level one and it is currently minimized, the
return size is empty (both width and height are 0).