C#, In btnSearchByName:

Declare a varible to store the result of the search, int intIndex;

Use an if statement with the Contains method to check if the name in the search box is in the queue.

If Contains is true, initialize intIndex to zero and use a foreach to walk through queue, else display a message that the name is not in the list.

If a match is found use intIndex to select the matching entry in listbox and display a message indicating the name was found. Be sure to increment intIndex each time through the loop.