Function returns temporary sheet - excel

Question

is this possible to create a function that returns temporary sheet?
Let's say I have got Sub as follow
Sub My_Sub()
Dim harm As Worksheet
Set harm = Sheets("my_sheet")
Dim lastRow As Long, arr
lastRow = harm.Range("A" & harm.Rows.Count).End(xlUp).Row
arr = harm.Range("T2:V" & lastRow).Value
MsgBox arr(2,5)+1
End Sub
Right now I'm working on harm = Sheets("my_sheet") and it loads whole sheet. Now I want to select part of that sheet and do the same operations so I wanted to write a function that will create temporary sheet, return it so in My_Sub I would have Set harm = ReturnSheet().
Is it possible? I want to load pseudo sheet from function, so I don't need to change anything in My_Sub (I mean those Ranges with column letter indexes).
Function ReturnSheet() As Worksheet
Dim Rng As Range
Dim lastRow As Long
Dim lastCol As Long
Set Rng = Selection
lastRow = Selection.Rows.Count
lastCol = Selection.Columns.Count
ReturnSheet.Range("A2").Resize(lastRow, lastCol).Value = Rng
End Function
Right now I'm getting Object variable or with block variable not set at ReturnSheet.Range("A2").Resize(lastRow, lastCol).Value = Rng

Answer 1

Try using the next Function. It returns a range meaning the selected cells without their first row:
Function ReturnRange(Optional boolAllRange As Boolean = False) As Range
Dim rng As Range: Set rng = Selection
If rng.rows.count = 1 Then Exit Function
If boolAllRange Then
Set ReturnRange = rng
Else
Set ReturnRange = rng.Offset(1).Resize(rng.rows.count - 1, rng.Columns.count)
End If
End Function
You can test it using the next Sub:
Sub testReturnRange()
Dim rng As Range
Set rng = ReturnRange 'eliminating the header
If Not rng Is Nothing Then Debug.Print rng.Address
Set rng = ReturnRange(True) 'header inclusive...
If Not rng Is Nothing Then Debug.Print rng.Address
End Sub