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WM_STYLECHANGING Overview  Group

The WM_STYLECHANGING message is sent to a window when the SetWindowLong function is about to change one or more of the window’s styles.

WM_STYLECHANGING 

wStyleType = wParam;            // extended or nonextended styles 

lpss = (LPSTYLESTRUCT) lParam;  // structure containing new styles 

 

Parameters

wStyleType
Value of wParam. Specifies whether the window’s extended or nonextended styles have changed. This parameter can be a combination of the following values:

Value

Meaning

GWL_EXSTYLE

The window’s extended styles are changing.

GWL_STYLE

The window’s nonextended styles are changing.

lpss
Value of lParam. Points to a STYLESTRUCT structure that contains the proposed new styles for the window. An application can examine the styles and, if necessary, change them.

Return Values

An application should return zero if it processes this message.

See Also

STYLESTRUCT, WM_STYLECHANGED

See also:


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