Text input File Step Using Variables and Wildcard

Hello,

I searched the forum and did not find a post related to this topic.

I am executing a Job with parameters. I would like to reference the Parameters defined in the job in a transformation executed by the job. The Transformation performs a "Text File Input" step and in this step I am attempting to obtain the Directory path as a variable and read all files that begin with a specific High Level Qualifier. I have been successful on using variables with the "Accept filenames from previous step" option, but cannot find any guidence related to including the use of a Wildcar as part of this option. Is it doable?

Thank You Very Much,
Mike