How do I reference dims from one part to another?

I'm a former Inventor user and have recently switchedtoSolidworks.  I'm trying to figure out how toreferencedimensions from one part into a completely different partso thatwhen I update the one dimension, the other part get updatedalongwith it.

Inventor has a system where parts can reference variablesfrom anexcel spreadsheet.  Even though there's a interface tothespreadsheet within Inventor, it's still a littleawkward. It does the job and I love the feature.  How doI dothis in Solidworks?

I posted yesterday but then deleted the message afterthinking Ifound a solution.  But in the end, it wasn't asolution afterall.  For some reason, the thread remained eventhough therewas no messages in it.
SolidworksAssemblies