It is a simple batch file that asks for the search topic, then brings you to the Wikipedia entry on that topic.
Step 1: Making the Batch File
First, open up a notepad document.
Go to -File-, -Save As...-, then in the 'File name' textfield, type in 'WikipediaSearcher.bat'. The name doesn't matter, but .bat is essential.
Remember to switch 'Save as type:' to 'All Files' from 'Text Documents'