in visual studio 6 is there a way to "Find All References". Don't see a shortcut key here
There is no "Find All References" in VB6. There is however an add-in that can find all references to procedures and functions (not variables). The add-in is called MZ-tools and the option you're looking for is called "Procedure Callers".
You can download the add-in over here (freeware trial version).
You can download the old freeware version 3 from this dropbox link of mine. Don't be fooled by the version nummer, that is the latest vb6 version available.