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Update lParam description of WM_NCACTIVATE message #1829

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Update lParam description of WM_NCACTIVATE message #1829

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4 changes: 2 additions & 2 deletions desktop-src/winmsg/wm-ncactivate.md
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Expand Up @@ -33,9 +33,9 @@ Indicates when a title bar or icon needs to be changed to indicate an active or
*lParam*
</dt> <dd>

When a [visual style](../controls/themes-overview.md) is active for this window, this parameter is not used.
If this parameter is set to -1, [**DefWindowProc**](/windows/desktop/api/winuser/nf-winuser-defwindowproca) does not repaint the nonclient area to reflect the state change.

When a visual style is not active for this window, this parameter is a handle to an optional update region for the nonclient area of the window. If this parameter is set to -1, [**DefWindowProc**](/windows/desktop/api/winuser/nf-winuser-defwindowproca) does not repaint the nonclient area to reflect the state change.
In other case. if *wParam* is **TRUE**, it indicates the **HWND** handle of the previously active window. If *wParam* is **FALSE**, it indicates the **HWND** handle of the window that is going to be activated. This can be **NULL** if the window that was previously active (or is going to be activated) is from other application.

</dd> </dl>

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