carrying over variable values

If the variable is declared within a routine then it's scope is restricted to that routine.

If you declare a private variable at the top of a module then it's scope is all routines within that module.

If you declare a public variable at the top of a module then it's scope is all routines within all modules of that vba project.

Private m_lngVar as long

Sounds like you want something like below (note assumed based on your post you're not utilising Option Explicit)

Module 1

Dim strVar As String
Sub One()
strVar = "Hello World"
Call Two()
Call Three()
End Sub

Sub Two()
MsgBox strVar
End Sub

Module 2

Sub Three()
MsgBox strVar
End Sub

strVar won't be accessible outside of Module 1