[PATCH v2] winex11.drv: Send HTMENU instead of HTCAPTION to query window activation.

Rémi Bernon rbernon at codeweavers.com
Tue Dec 24 03:49:08 CST 2019

Commit 71d35d8940118bc6de6522913fb8c473fa5b2c24 broke the way
WM_TAKE_FOCUS protocol is implemented: WM_MOUSEACTIVATE now replies
MA_NOACTIVATE by default when using HTCAPTION.

We use the WM_MOUSEACTIVATE -although Windows does not- regardless of
the way focus is changed to check whether a window wants focus, and
Windows sometimes changes focus regardless of the message reply.

Steam and the Wine system tray are affected for instance.

Signed-off-by: Rémi Bernon <rbernon at codeweavers.com>

Resending just this one as the other seems too risky and has been
deferred. I have looked for matching bugs, but couldn't find any for
sure, and I'm not sure if opening a bug just for it now is worth it.

The dinput mouse test is going to be broken again until a proper fix is
found -not because of the focus on mouse hover as I first thought but
because of the CreateWindow / X11 focus message race condition, as
described in:


 dlls/winex11.drv/event.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/winex11.drv/event.c b/dlls/winex11.drv/event.c
index dd8837c11da..07f7a1ad502 100644
--- a/dlls/winex11.drv/event.c
+++ b/dlls/winex11.drv/event.c
@@ -706,7 +706,7 @@ static void handle_wm_protocols( HWND hwnd, XClientMessageEvent *event )
              * whether the window wants to be activated */
             LRESULT ma = SendMessageW( hwnd, WM_MOUSEACTIVATE,
                                        (WPARAM)GetAncestor( hwnd, GA_ROOT ),
-                                       MAKELONG(HTCAPTION,WM_LBUTTONDOWN) );
+                                       MAKELONG( HTMENU, WM_LBUTTONDOWN ) );
             if (ma != MA_NOACTIVATEANDEAT && ma != MA_NOACTIVATE)
                 set_focus( event->display, hwnd, event_time );

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