PRB: Menus for Notification Icons Do Not Work Correctly

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This article was previously published under Q135788

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SYMPTOMS

When you display a context menu for a notification icon (see Shell_NotifyIcon), clicking anywhere besides the menu or the window that created the menu (if it is visible) doesn't cause the menu to disappear. When this behavior is corrected, the second time this menu is displayed, it displays and then immediately disappears.

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RESOLUTION

To correct the first behavior, you need to make the current window the foreground window before calling TrackPopupMenu or TrackPopupMenuEx.

The second problem is caused by a problem with TrackPopupMenu. It is necessary to force a task switch to the application that called TrackPopupMenu at some time in the near future. This can be accomplished by posting a benign message to the window or thread.

The following code will take care of all of this:

   SetForegroundWindow(hDlg);

   // Display the menu
   TrackPopupMenu(   hSubMenu,
                     TPM_RIGHTBUTTON,
                     pt.x,
                     pt.y,
                     0,
                     hDlg,
                     NULL);

   PostMessage(hDlg, WM_NULL, 0, 0);

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