Using command line parameters with ShellExecute() ?

Atom

Hi, I am trying to call ShellExecute() to run an .exe that takes 1 or more file paths as command line parameter(s). Although when I format a string like: ""C:\\file1.txt" "C:\\file2.txt" "C:\\file3.txt"" as the lpParameters param I always get an SE_ERR_ACCESSDENIED error. Am I using the correct command line formatting, as if I pass a "" (NULL string) as lpParameters the function runs the exe OK. Many Thanks.

toxcct

use the \" character to insert a double quote character in your string

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Atom

This is what i've done already, The string I've included in the example is how it appears in memory(NOT in source code). I just can't work this out as when I double click a file that is associated with the exe in explorer the command line reads with quotes around that file name EXACTLY as I have in the source code.

Michael Dunn

Atom wrote:

The string I've included in the example is how it appears in memory(NOT in source code).

Then the backslashes are the problem. You only use one backslash in file paths.

--Mike-- Visual C++ MVP :cool: LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ Ford, what's this fish doing in my ear?

Atom

Hi, Thanks, solved the problems with the backslashes, now I can shellexecute() with a command line containing multiple file paths. The problem I am having now is that when I test the command line string with a string of length 1951 it works fine, but if I add one more file path to this string which takes the length to 1983 the function fails. So presumably the command line string has a max length between 1951 & 1983. I will test this further, maybe shellexecuteEX() is the way to go. Many thanks for your help.

toxcct

how do you know the function fails ? getting an error message ? if yes, can you share with us ? BTW, ther's nothing restricting the length of the parameter you're talking about under the 1983 characters. this is simply non sense... !

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Atom

The error that I was getting was, SE_ERR_ACCESSDENIED The length limit is NOT nonsense. ! The following link describes the length restrictions on the parameter I am talking about: ShellExecute parameter limit. I guess my 1983 char length string has the .exe file path name appended to it taking the to total string length to > INTERNET_MAX_URL_LENGTH. Which is why I was getting the error. I've solved the problem now, using an intermediate file to get around any command line length limits. Thanks for the advice.

toxcct

yes, and quoting it says : If you are using the ShellExecute/Ex function, then you become subject to the INTERNET_MAX_URL_LENGTH (around 2048) command line length limit imposed by the ShellExecute/Ex functions. (If you are running on Windows 95, then the limit is only MAX_PATH.) so...

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