AdjustWindowRectEx

The AdjustWindowRectEx function calculates the required size of the rectangle of a window with extended style based on the desired client-rectangle size. The window rectangle can then be passed to the CreateWindowEx function to create a window whose client area is the desired size.

BOOL AdjustWindowRectEx(

LPRECT lpRect, // pointer to client-rectangle structure
DWORD dwStyle, // window styles
BOOL bMenu, // menu-present flag
DWORD dwExStyle // extended style
);


Parameters

lpRect

Pointer to a RECT structure that contains the coordinates of the top-left and bottom-right corners of the desired client area. When the function returns, the structure contains the coordinates of the top-left and bottom-right corners of the window to accommodate the desired client area.

dwStyle

Specifies the window styles of the window whose required size is to be calculated.

bMenu

Specifies whether the window has a menu.

dwExStyle

Specifies the extended style of the window whose required size is to be calculated.



Return Values

If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

A client rectangle is the smallest rectangle that completely encloses a client area. A window rectangle is the smallest rectangle that completely encloses a window.
The AdjustWindowRectEx function does not add extra space when a menu bar wraps to two or more rows.