Get product version from a custom action

I have a Wix installer. In the Product.wxs file, I have the below piece of code:

<Product Id="*"
    Name="$(var.PRODUCT_NAME)"
    Language="1033"
    Version="!(bind.FileVersion.myDLLfile)"
    Manufacturer="$(var.CompanyName)"
    UpgradeCode="{D00BA432-7798-588A-34DF-34A65378FD45}">

In the Features.wxs, I have the myDLLfile defined as component:

<Component Id="myDLLfile"
    Guid="{30550881-053F-768D-88B7-BB9853B23C51}">
    <File Id="myDLLfile"
        Source="$(var.dllDir)\myDLLfile.dll"
        KeyPath="yes"
        Checksum="yes"/>
</Component>

Now, I would like to know if from a custom action in C# I can get that same Product Version (which corresponds to the version of the myDllfile.dll). Is it possible? If so, how?

Solution

The easiest way is probably to store the value in a Property and read that property in the custom action. The bind variable syntax would make setting the property easy.

   <Property Id="ThisIsASillyThingToNeedToDo" Value="!(bind.FileVersion.myDLLfile)" />