What is the method to Start a subroutine in workbook "B" from workbook "A"?

Also, if any public variables or subs in "B" have the same name as public variables in "A", will it cause conflicts? (Because workbook "A" is actually in a routine when it initiates the routine in "B")

Thanks

For a public sub:
Call Workbooks("TargetBookName").Worksheets("SheetNameW ithFunction").SubName(OptionalPassedVariables)

For a Public Function you want to pass value back from:
sMyVal = Workbooks("TargetBookName").Worksheets("SheetNameW ithFunction").FunctionName(OptionalPassedVariables )

You're declaring public variables? Not only that but ones that are actually duplicated workbook to workbook but have differing values? I'd try to steer clear of declaring any public variables if you can help it.

When declared public a variable is seen throughout the entire application. If you must and they must be the same then try specifying "Option Private Module" in the module.