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 WM_STYLECHANGED

The WM_STYLECHANGED message is sent to a window after the SetWindowLong function has changed one or more of the window's styles.

A window receives this message through its WindowProc function.

    LRESULT CALLBACK WindowProc(
      HWND hwnd,       // handle to window
      UINT uMsg,       // WM_STYLECHANGED
      WPARAM wParam,   // window style types
      LPARAM lParam    // new styles (LPSTYLESTRUCT)
    );

Parameters

• wParam Specifies whether the window's styles or extended window styles have changed. This parameter can be one or more of the following values. Value Meaning GWL_EXSTYLE The extended window styles have changed. GWL_STYLE The window styles have changed.
• lParam Pointer to a STYLESTRUCT structure that contains the new styles for the window. An application can examine the styles, but can not change them.

Return Values

An application should return zero if it processes this message.

For more information on the Windows 95/98 implementation of this message, see Window Management Differences.

Requirements

  Windows NT/2000 or later: Requires Windows NT 3.51 or later.
  Windows 95/98/Me: Requires Windows 95 or later.
  Header: Declared in Winuser.h; include Windows.h.

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Notebook exported on Monday, 7 July 2008, 18:56:50 PM Eastern Daylight Time