Hi,
It most likely refers to the Measurement & Automation Explorer (MAX). A link to MAX should be placed on your desktop.
MAX has an entry called "Device and interfaces". Under this label you'll find the ports. When you click on COM1, for example, on the right side of the explorer you'll see the properties of this resource, which includes the VISA resource name (ASRL1::INSTR).
Hope this helps.
DiegoF.