Problem: For a Basic MSI Project in InstallShield 2009, I need to pass in 1 or more custom command-line arguments to use during installation/un-installation/etc.

Step 1 – Accessing your custom command-line arguments

First, accessing these values are as easy as accessing other variables in InstallShield.  All you need to do is use the format [MYARGUMENTNAME].  So, for example, if you want to use one of the arguments when invoking an executable from a custom action, it may look like this image below.  My custom action is invoking an executable called myapp.exe and I am accessing a custom command line argument named FILENAME to use as part of the invocation of my executable.

Step 2 – Passing in your custom command-line arguments

It’s really this simple.. each argument needs to be preceeded by a /v and wrapped in quotes.  Continuing the example above, here is how I pass in my custom command line argument named FILENAME:

     setup.exe /v"FILENAME=\"myfile.txt\""

This would result in my custom action invoking my executable as follows:   myapp.exe -f myfile.txt

To be clear on multiple custom command-line arguments, the following example adds a second argument to my example above:

     setup.exe /v"FILENAME=\"myfile.txt\"" /vSECONDARGUMENT=\"value2\""