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See Also: Excel Variables
Excel VBA Variables Lifetime &
In Excel, when coding in VBA, we can use what are know as variables to store information. These variables (as the name suggests) can be varied and changed to store different data information. As soon as a variable loses scope it loses its stored value.
Excel VBA Variables Levels
There are 3 levels at which we can dimension (Dim) variables. These are;
3) Project-Level, Workbook Level, or Public Module-Level
Each of these levels differ in scope and lifetime. This is discussed below
These are probably the best known and widely used variables. They are dimensioned (Dim) inside the Procedure itself. See Example below;
Sub MyMacro () Dim lRows as Long 'Code Here End Sub
All variables dimensioned at this level are only available to
the Procedure that they are within. As soon as the Procedure finishes, the
variable is destroyed.
These are variables that are dimensioned (Dim) outside the Procedure itself at the very top of any Private or Public Module. See Example below;
Dim lRows as Long Sub MyMacro () 'Code Here End Sub
All variables dimensioned at this level are available to all Procedures that
they are within the same Module the variable is dimensioned in. Its value is retained
unless the Workbook closes or
the End Statement is used.
Project-Level, Workbook Level, or Public Module-Level
These variables are dimensioned at the top of any standard public module, like shown below;
Public lRows as Long
All variables dimensioned at this level are available to all Procedures in all Modules. Its value is retained unless the Workbook closes or the End Statement is used.
See Also: Excel Variables
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