How to reference checkedlistbox from one class to another

I have too user controls in my program, one of them has a list on it, and I want to reference the list from the other panel. To be more specific, my list is printersList in panel goPanel, and I want panel goPanel to reference it. I get the the error: "Reference to a non-shared member requires an object reference." I've done a lot of research on this error, for about the past hour, but have not been able to make sense out of it, can anyone point me in the right direction? Thanks