Using " in ShellExecute() commands


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We need to run some commands that include " within the command.  For example, using this command to disable the system screensaver in the registry:

reg delete "HKEY_CURRENT_USER\Control Panel\Desktop" /v scrnsave.exe /f

The trouble is that the Windows registry has spaces in some of it's paths, despite going to the effort of replacing spaces with underscores in HKEY_CURRENT_USER.  To get around the spaces you have to use " within the command but if you use these commands within ShellExecute() it will fail as the extra speech marks will interfere with the command being parsed.

Therefore, my question is, can you replace " with some kind of control character within a ShellExecute command?  Or is there another way of doing this?  Would the command be loaded into a variable and then parsed somehow?

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In DAQFactory ' and " are interchangeable, though they still have to be used in pairs.  So, you could do:

system.shellExecute("reg",'delete "HKEY_CURRENT_USER\Control Panel\Desktop" /v scrnsave.exe /f')

or something like that.  Notice how the first string, "reg" uses double quotes, but the second one I used single quotes to define the string.  The double quotes inside this string are processed as double quote characters in the string.

As mentioned, you have to use them in pairs:

"abc" and 'abc' result in the same string.  "abc' is invalid. 


results in a string:




results in the string:


If you need to use both ' and " inside your string, then you can concatenate up multiple strings.  For example to create the string:


you would do:

"abc'de" + 'f"abc'

or something similar (you can put the + in several places.  I chose between e and f to make it clearer).  

If you have a lot of it, its sometimes clearer to create variables:

private string sq = "'" // double quote, single quote, double quote
private string dq = '"'  // its really hard to see, but that is a single quote, double quote then single quote
private string out = "abc" + sq + "def" + dq + "abc"

I rarely do this, but then you rarely need to use both so often.  I am more apt to use this method with carriage return / line feed pairs:

private string CRLF = chr(13) + chr(10)
private out = "get data" + CRLF



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