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AdjustWindowRect info  Overview  Group

The AdjustWindowRect function calculates the required size of the window rectangle, based on the desired client-rectangle size. The window rectangle can then be passed to the CreateWindow function to create a window whose client area is the desired size.

BOOL AdjustWindowRect(

    LPRECT lpRect,

// pointer to client-rectangle structure

    DWORD dwStyle,

// window styles

    BOOL bMenu 

// menu-present flag



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.
Specifies the window styles of the window whose required size is to be calculated.
Specifies whether the window has a menu.

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.


A client rectangle is the smallest rectangle that completely encloses a client area. A window rectangle is the smallest rectangle that completely encloses the window, which includes the client area and the nonclient area.

The AdjustWindowRect function does not add extra space when a menu bar wraps to two or more rows.

See Also

AdjustWindowRectEx, CreateWindow, RECT 

See also:

file: /Techref/os/win/api/win32/func/src/f01_17.htm, 3KB, , updated: 2000/4/7 12:19, local time: 2022/5/21 16:11,

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