Which hex value does "beep" when echoed at the cmdprompt?

[pstein]

Sometimes I output lots of text stuff with "Echo" at the cmdline.

And it occurs occasionally that a "beep" can be heared.

So it seems to me that this is a hidden, invisible control char somewhere embedded in the text.

Exactly which hex value causes the command prompt to beep when its echoed from a batch script?

Peter

[ShadowThief]

07, otherwise known as the Bell character

[Yury]

Code: Select all

@echo off

forfiles /m "%~nx0" /c "cmd /c echo 0x07"

for /f %%i in ('forfiles /m "%~nx0" /c "cmd /c echo 0x07"') do set BEL=%%i
echo %BEL%

or

Code: Select all

@echo off

mshta "vbscript:CreateObject("Scripting.FileSystemObject").GetStandardStream(1).Write(Chr(7))&Close()"| more

for /f %%i in ('mshta "vbscript:CreateObject("Scripting.FileSystemObject").GetStandardStream(1).Write(Chr(7))&Close()"') do set BEL=%%i
echo %BEL%

.



For Windows 8 (?), Windows 8.1:

Code: Select all

@echo off

forfiles /m "%~nx0" /c "cmd /c echo 0x07"
timeout /t 1 /nobreak>nul

for /f %%i in ('forfiles /m "%~nx0" /c "cmd /c echo 0x07"') do set BEL=%%i
echo %BEL%
timeout /t 1 /nobreak>nul

or

Code: Select all

@echo off

mshta "vbscript:CreateObject("Scripting.FileSystemObject").GetStandardStream(1).Write(Chr(7))&Close()"| more

for /f %%i in ('mshta "vbscript:CreateObject("Scripting.FileSystemObject").GetStandardStream(1).Write(Chr(7))&Close()"') do set BEL=%%i
echo %BEL%
timeout /t 1 /nobreak>nul

.