connecting a printer?

correct me if i’m wrong please…but a friend asked me about this and i want to make sure i gave the right answer…

my friend’s home network consists for a wireless router…her laptop…and an HP Printer (sorry don’t know the model but it’s NOT wireless)

anyway…she wanted to know if there was a way to connect her printer to the network wirelessly…

without thinking about to much…i told her it was not possible if it wasn’t a wireless printer…

i’m thinking it has to be connected to the network via ethernet or usb cable…right?

Please let me know if i’m right in my answer…this a good friend and i don’t want to give her erroneous information…

thanks…