The OS/2 operating system is designed to work with or without a mouse or other pointing device. The system provides default behavior that enables a user to interact with menus without a mouse. Following are the keystrokes that produce this default behavior:
旼컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿖eystroke 쿌ction � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿌lt 쿟oggles in and out of menu-bar mode. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿌lt+Spacebar 쿞hows the system menu. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿑10 쿍acks up one level. If a submenu is � � 쿭isplayed, it is canceled. If no submenu� � 쿶s displayed, this keystroke exits the � � 쿺enu. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿞hift+Esc 쿞hows the system menu. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿝ight Arrow 쿎ycles to the next top-level menu item. � � 쿔f the selected item is at the far-left � � 퀂ide of the menu, the menu code sends a � � 쿥M_NEXTMENU message to the frame window.� � 쿟he default processing by the frame � � 퀇indow is to cycle between the � � 쿪pplication and system menus. (An � � 쿪pplication can modify this behavior by � � 퀂ubclassing the frame window.) If the � � 퀂elected item is in a submenu, the next � � 쿬olumn in the submenu is selected, or � � 퀃he next top-level menu item is � � 퀂elected; this keystroke also can send � � 쿽r process a WM_NEXTMENU message. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿗eft Arrow 쿥orks like the Right Arrow key, except � � 쿶n the opposite direction. In submenus, � � 퀃his keystroke backs up one column, � � 쿮xcept when the currently selected item � � 쿶s in the far-left column, in which case� � 퀃he previous submenu is selected. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿢p Arrow or Down 쿥hen pressed in a top-level menu, � 쿌rrow 쿪ctivates a submenu. When pressed in a � � 퀂ubmenu, this keystroke selects the � � 쿾revious or next or item, respectively. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿐nter 쿌ctivates a submenu, and highlights the � � 쿯irst item if an item has a submenu � � 쿪ssociated with it; otherwise, this � � 쿸eystroke chooses the item as though the� � 퀅ser released the mouse button while the� � 쿶tem was selected. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿌lphabetic character쿞elects the first menu item with the � � 퀂pecified character as its mnemonic key.� � 쿌 mnemonic is defined for a menu item by� � 쿾lacing a tilde (~) before the character� � 쿶n the menu text. If the selected item � � 쿴as a submenu associated with it, the � � 쿺enu is displayed, and the first item is� � 쿴ighlighted; otherwise, the item is � � 쿬hosen. � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
An application does not support the default keyboard behavior with any unusual code; instead, the application receives a message when a menu item is chosen by the keyboard just as though it had been chosen by a mouse.