How to read dll file version before installation

[sansa20]

I have a setup project to generate an msi installer. I am looking for a way to read the version of the binaries used to generate this installer, before installation so that I can hold the version in a variable and incorporate conditional installation of my msi. Is there any way to achieve this? I know I can use the filesearch element to check if the binaries are present, but how do I read the version and specify that it should be done before installation?
Currently this is how my code looks, I have included a wxi file with the version hardcoded in my bundle project

<?xml version="1.0" encoding="utf-8"?>
<Include>
	<!-- TODO: Put your code here. -->
	<?define OpenTapDllCompareVersion = v9.18.5.0?>
</Include>

I want to completely eliminate hardcoding 9.18.5.0, and instead just read the version from the dll and assign it to a variable. Is this possible?