+ May be wxITEM_SEPARATOR, wxITEM_NORMAL, wxITEM_CHECK or wxITEM_RADIO
+
+ @remarks
+ This command can be used after the menu has been shown, as well as on
+ initial creation of a menu or menubar.
+
+ The item string for the normal menu items (not submenus or separators)
+ may include the accelerator which can be used to activate the menu item
+ from keyboard.
+ The accelerator string follows the item label and is separated from it
+ by a TAB character ('\\t').
+
+ Its general syntax is any combination of "CTRL", "ALT" and "SHIFT" strings
+ (case doesn't matter) separated by either '-' or '+' characters and followed
+ by the accelerator itself.
+ The accelerator may be any alphanumeric character, any function key
+ (from F1 to F12) or one of the special characters listed in the table
+ below (again, case doesn't matter):
+
+ - DEL or DELETE: Delete key
+ - INS or INSERT: Insert key
+ - ENTER or RETURN: Enter key
+ - PGUP: PageUp key
+ - PGDN: PageDown key
+ - LEFT: Left cursor arrow key
+ - RIGHT: Right cursor arrow key
+ - UP: Up cursor arrow key
+ - DOWN: Down cursor arrow key
+ - HOME: Home key
+ - END: End key
+ - SPACE: Space
+ - TAB: Tab key
+ - ESC: or ESCAPE Escape key (Windows only)