MyEarth

ShellExecute with empty param

6 posts in this topic

#1 ·  Posted (edited)

I want to pass parameter like variable to a ShellExecute, not so easy seems. Since the everything is optional except the filename i have think to make something like $verb = "" and the other but not work, check this out:

ShellExecute("notepad.exe", "C:\Text.txt", Default, Default, Default)
ShellExecute("notepad.exe", "C:\Text.txt", "", "", "")
;~ ShellExecute("notepad.exe", "C:\Text.txt")

Obv need a file in C:\Text.txt or whatever you like. The first two not work, the last yes but i want to variable to optional *if* user with the GUi what to add it. I need to make many ShellExecute based on optional parameter for do this? Autoit 3.3.8.1

Thanks

Edited by MyEarth

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Default values looks like.

ShellExecute("notepad.exe", "C:\test.txt","","",@SW_SHOWNORMAL)

Saludos

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This works for me

$soft = "notepad.exe"
$file = @desktopdir & "\1.txt"
$workingdir = "" 
$verb = "" 
$flag = @SW_SHOW  ; cannot be ""

ShellExecute($soft, $file, $workingdir, $verb)  ; , $flag)

 

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There is something i don't understand, the showflag cannot be empty, right? But if i don't write how the function understand i don't have pass a parameter if it don't have a default value?

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default flag for showflag is @SW_SHOWNORMAL if you put anything (I mean not set default keyword o anything). If you put default keyword AutoIt does not care about it and pass -1. then internally ends as 2^16-1 unsigned short int.

 

Saludos

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There is something i don't understand, the showflag cannot be empty, right? But if i don't write how the function understand i don't have pass a parameter if it don't have a default value?

The only parameter needed for ShellExecute is the filename parameter, everything else is optional to have it run. In your example you only need 2 parameters, the program to run (Notepad.exe) and the file to open (C:\test.txt). If you're not going to change the optional parameters, you do not need to include them in the function line.

The only time you need to set the optional parameters to the default values is if you're changing an optional parameter that comes after one of the other optional ones, then you must include them even if set to default.


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