So, where do you have the problem? What have you tried so far? Is this homework? Then, most likely, the solution is covered in your course material already.

You might want to read the fine Perl documentation, especially about the function system, about the backtick operator (qx) and possibly about the various IPC modules, many of which already come with Perl. Depending on your unstated needs, you might also find Win32::Process of interest. But without you telling us what you need, what you've tried, and where your problems are, all our help can only remain unspecific.