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Windows NT
Yes
Win95
Yes
Win32s
Yes
Import Library
-
Header File
winuser.h
Unicode
No
Platform Notes
None

WM_STYLECHANGING

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


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