excel vba convert string to range - vba

Question

I am trying to run a macro on 3 different ranges, one after another. Once the range is selected, the code works just fine (where variables F and L are defined). I would like to set r1-r3 as Ranges I need and then use a string variable to concatenate the range numbers together. This code works, but doesn't provide the starting and ending row number in the range selected. This is vital because it tells the "TableCalc" macro when to start and stop the code. I would then like to move on to the next range. Thanks for your help.
Sub TestRangeBC()
WS.Select
Dim r1 As Range
Dim r2 As Range
Dim r3 As Range
Dim rngx As String
Dim num As Integer
Dim rng As Range
Set r1 = WS.Range("ONE")
Set r2 = WS.Range("TWO")
Set r3 = WS.Range("THREE")
For num = 1 To 3
rngx = "r" & num
Set rng = Range(rngx)
Dim F As Integer
Dim L As Integer
F = rng.Row + 1
L = rng.Row + rng.Rows.Count - 2
Cells(F, 8).Select
Do While Cells(F, 8) <> "" And ActiveCell.Row <= L
'INSERT SITUATIONAL MACRO
Call TableCalc
WS.Select
ActiveCell.Offset(1, 0).Select
Loop
Next num
End Sub

Answer 1

This is not the answer (as part of your code and what you are trying to achieve is unclear yet), but it is a "cleaner" and more efficient way to code what you have in your original post.
Option Explicit
Dim WS As Worksheet
Your original Sub shorten:
Sub TestRangeBC()
' chanhe WS to your Sheet name
Set WS = Sheets("Sheet1")
Call ActiveRange("ONE")
Call ActiveRange("TWO")
Call ActiveRange("THREE")
End Sub
This Sub gets the Name of the Named Range (you set in your workbook) as a String, and sets the Range accordingly.
Sub ActiveRange(RangeName As String)
Dim Rng As Range
Dim F As Integer
Dim L As Integer
Dim lRow As Long
With WS
Set Rng = .Range(RangeName)
' just for debug purpose >> to ensure the right Range was passed and set
Debug.Print Rng.Address
F = Rng.Row + 1
L = Rng.Row + Rng.Rows.Count - 2
lRow = F
' what you are trying to achieve in this loop is beyond me
Do While .Cells(F, 8) <> "" And .Cells(lRow, 8).Row <= L
Debug.Print .Cells(lRow, 8).Address
'INSERT SITUATIONAL MACRO
' Call TableCalc
' not sure you need to select WS sheet again
WS.Select
lRow = lRow + 1
Loop
End With
End Sub
What are you trying to test in the loop below, what are the criteria of staying in the loop ?
Do While Cells(F, 8) <> "" And ActiveCell.Row <= L

Answer 2

it's really hard to tell what you may want to do
but may be what follows can help you clarifying and (hopefully) doing it!
first off, you can't "combine" variable names
So I'd go with an array of named ranges names (i.e. String array) to be filled by means of a specific sub:
Function GetRanges() As String()
Dim ranges(1 To 3) As String
ranges(1) = "ONE"
ranges(2) = "TWO"
ranges(3) = "THREE"
GetRanges = ranges
End Function
so that you can clean up your "main" sub code and keep only more relevant code there:
Sub TestRangeBC()
Dim r As Variant
Dim ws As Worksheet
Set ws = Worksheets("Ranges") '<--| change "Ranges" to your actual worksheet name
For Each r In GetRanges() '<--| loop through all ranges names
DoIt ws, CStr(r) '<--| call the range name processing routine passing worksheet and its named range name
Next r
End Sub
the "main" sub loops through the named ranges array directly collected from GetRanges() and calls DoIt() to actually process the current one:
Sub DoIt(ws As Worksheet, rangeName As String)
Dim cell As Range
Dim iRow As Long
With ws.Range(rangeName) '<--| reference the passed name passed worksheet named range
For iRow = .Rows(2).Row To .Rows(.Rows.Count - 2).Row '<--| loop through its "inner" rows (i.e. off 1st and last rows)
Set cell = ws.Cells(iRow, 8) '<--| get current row corresponding cell in column "F"
If cell.value = "" Then Exit For '<--| exit at first blank column "F" corresponding cell
TableCalc cell '<-- call TableCalc passing the 'valid' cell as its parameter
Next iRow
End With
End Sub