解决菜单宏中控制符+不能正常使用（Control + letter characters in ActiveX menu ...
问题：
Chr(94) + Chr(80) (^P) is supposed to toggle menuecho, but they are passed to
the command line as literals rather than being interpreted. When I use this, why
does " ^P_Open unknown command" occur?
Answer
There is a character code chart in MSDN that lists the different numeric ASCII
character codes that can be used for the Cntrl + Letter sequences.
The following lists these numeric codes and the associated menu macro syntax:
ASCII Character Codes
; chr(59) Issues ENTER
^M chr(13) Issues ENTER
^| chr(94) + chr(124) Issues TAB (I did not find any special number
for this)
SPACEBAR chr(32) Enters a space; blank space between command sequences in
a menu item is equivalent to pressing the SPACEBAR
\ chr(92) Pauses for user input
_ chr(95) Translates AutoCAD commands and key words that follow
+ chr(43) Continues menu macro to the next line (if last character)
=* chr(61) + chr(42) Displays the current top-level image, pull-down,
or shortcut menu
*^C^C chr(42) + chr(3) + chr(3) Prefix for a repeating item
$ chr(36) Loads a menu section or introduces a conditional DIESEL macro
expression
^B chr(2) Toggles Snap on or off (CTRL+B)
^C chr(3) Cancels command (CTRL+C)
ESC Chr(3)Cancels command (ESC)
^D chr(4) Toggles Coords on or off (CTRL+D)
^E crh(5) Sets the next isometric plane (CTRL+E)
^G chr(7) Toggles Grid on or off (CTRL+G)
^H chr(8) Issues backspace
^O chr(15) Toggles Ortho on or off (CTRL+O)
^P chr(16) Toggles MENUECHO on or off
^Q chr(17) Echoes all prompts, status listings, and input to the printer
(CTRL+Q)
^T chr(20) Toggles Tablet on or off (CTRL+T)
^V chr(22) Changes current viewport (CTRL+V)
^Z chr(26) Null character that suppresses the automatic addition of
SPACEBAR at the end of a menu item
A VBA example that demonstrates creating a Menu Item with Chr(16) in the
menumacro to toggle menuecho off, before setting the system variable PSPROLOG:
下面是VBA源码：
**** Hidden Message *****
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