When using CXTTTRAYICON, the method of dynamically changing the menu item uses CXTTRAYICON in the program, and finds that the menu item cannot be dynamically changed, such as the disable / allow menu item, modify the text of the menu. After reading the source code of CXTTrayicon, found two solutions: 1. If you use the CXTTRAYICON variable directly in the dialog, add message processing function AFX_MSG LRESULT ONTRAYNOTIFICATION (WPARAM WPARAM, LPARAM LPARAM);
BEGIN_MESSAGE_MAP (CTrayIconTestDlg, CDialog) // {{AFX_MSG_MAP (CTrayIconTestDlg) //}} AFX_MSG_MAP ON_MESSAGE (TIN_XT_TRAYICON, OnTrayNotification) END_MESSAGE_MAP () LRESULT CTrayIconTestDlg :: OnTrayNotification (WPARAM wParam, LPARAM lParam) {switch (LOWORD (lParam)) {case WM_RBUTTONUP: {cmenu Menu; if (! Menu.loadmenu (idR_Menu1)) {return 0;} cmenu * psubmenu = menu.getsubmenu (0); if (psubmenu == null) {Return 0;} // Display the menu At . the current mouse location There's a "bug" // (Microsoft calls it a feature) in Windows 95 that requires calling // SetForegroundWindow To find out more, search for Q135788 in MSDN // CPoint pos;.. GetCursorPos (& pos); menu.EnableMenuItem (ID_MENUITEM_MENU1, MF_DISABLED | MF_GRAYED); menu.CheckMenuItem (ID_MENUITEM_MENU2, MF_CHECKED); :: TrackPopupMenu (pSubMenu-> m_hMenu, 0, pos.x, pos.y, 0, this-> m_hWnd, NULL); menu . Detach ();} Break;} Return True;} Note: Be sure to return to True to avoid CXTTTRAYICON processing; use menu.enableMenuItem ID_MENUITEM_MENU1, MF_DISABLED | when MF_GRAYED) prohibits the menu item, must pay attention to add MF_GRAYED2 If the new class CTrayIconEx inherited from CXTTrayIcon, then you can override the message processing function CXTTrayIcon in: virtual afx_msg LRESULT OnTrayNotification (WPARAM wParam, LPARAM lParam);. Other processing same
