Skip to content

SetActiveWindow can return NULL in case of success #2169

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
nikita-leontiev wants to merge 1 commit into
base: docs
Choose a base branch
from
Open

SetActiveWindow can return NULL in case of success #2169

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 4 additions & 4 deletions sdk-api-src/content/winuser/nf-winuser-setactivewindow.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -74,16 +74,16 @@ A handle to the top-level window to be activated.

Type: <b>HWND</b>

If the function succeeds, the return value is the handle to the window that was previously active.
If the function succeeds, the return value is the handle to the window that was previously active or <b>NULL</b>.

If the function fails, the return value is <b>NULL</b>. To get extended error information, call <a href="/windows/desktop/api/errhandlingapi/nf-errhandlingapi-getlasterror">GetLastError</a>.
Function failure is indicated by a return value of <b>NULL</b> and a <a href="/windows/desktop/api/errhandlingapi/nf-errhandlingapi-getlasterror">GetLastError</a> result that is nonzero.

## -remarks

The <b>SetActiveWindow</b> function activates a window, but not if the application is in the background. The window will be brought into the foreground (top of <a href="/windows/desktop/winmsg/window-features">Z-Order</a>) if its application is in the foreground when the system activates the window.

If the window identified by the
<i>hWnd</i> parameter was created by the calling thread, the active window status of the calling thread is set to
If the window identified by the
<i>hWnd</i> parameter was created by the calling thread, the active window status of the calling thread is set to
<i>hWnd</i>. Otherwise, the active window status of the calling thread is set to <b>NULL</b>.

## -see-also
Expand Down