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SetFocus article update #2134

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SetFocus article update #2134

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2 changes: 2 additions & 0 deletions sdk-api-src/content/winuser/nf-winuser-setfocus.md
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Expand Up @@ -81,6 +81,8 @@ Type: **HWND**

If the function succeeds, the return value is the handle to the window that previously had the keyboard focus. If the *hWnd* parameter is invalid or the window is not attached to the calling thread's message queue, the return value is NULL. To get extended error information, call [GetLastError function](../errhandlingapi/nf-errhandlingapi-getlasterror.md).

If the window that previously had the keyboard focus was destroyed after losing focus, the return value is NULL and [GetLastError function](../errhandlingapi/nf-errhandlingapi-getlasterror.md) return value is ERROR_SUCCESS (0).

Extended error ERROR_INVALID_PARAMETER (0x57) means that window is in disabled state.

## -remarks
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