Excel VBA Range for all relevant cells - excel

Question

My macro creates a large text file by writing all the data from all sheets in the active workbook.
In each worksheet, it is necessary to determine a certain rectangular range of cells that would be saved in the text file. It's upper left corner would always be A1, but the lower right corner should be chosen so that the range includes all cells with any content (formatting does not matter).
I thought ws.Range("A1").CurrentRegion would do the trick, but it does not work when A1 and the nearby cells are empty. If the only cell with data in the sheet is Q10, then the range should be A1:Q10.
Of course, I could loop over the ws.Cells range to discover the range of interest, but that's quite time consuming, I hope there's more effective way. If I select all cells in a sheet and do a copy-paste to notepad, I do not end up with hundreds of empty columns and thousands of empty rows, only the relevant data are copied. The question is how to replicate that with VBA.
This is my code so far:
Sub CreateTxt()
'This macro copies the contents from all sheets in one text file
'Each sheet contents are prefixed by the sheet name in square brackets
Dim pth As String
Dim fs As Object
Dim rng As Range
pth = ThisWorkbook.Path
Set fs = CreateObject("Scripting.FileSystemObject")
Dim outputFile As Object
Set outputFile = fs.CreateTextFile(pth & "\Output.txt", True)
Dim WS_Count As Integer
Dim ws As Worksheet
Dim I As Integer
WS_Count = ActiveWorkbook.Worksheets.Count
For I = 1 To WS_Count
Set ws = ActiveWorkbook.Worksheets(I)
outputFile.WriteLine ("[" & ws.Name & "]")
Debug.Print ws.Name
Set rng = ws.Range("A1").CurrentRegion
outputFile.WriteLine (GetTextFromRangeText(rng, vbTab, vbCrLf))
Next I
outputFile.Close
End Sub
Function GetTextFromRangeText(ByVal poRange As Range, colSeparator As String, rowSeparator As String) As String
Dim vRange As Variant
Dim sRow As String
Dim sRet As String
Dim I As Integer
Dim j As Integer
If Not poRange Is Nothing Then
vRange = poRange
Debug.Print TypeName(vRange)
For I = LBound(vRange) To UBound(vRange)
sRow = ""
For j = LBound(vRange, 2) To UBound(vRange, 2)
If j > LBound(vRange, 2) Then
sRow = sRow & colSeparator
End If
sRow = sRow & vRange(I, j)
Next j
If sRet <> "" Then
sRet = sRet & rowSeparator
End If
sRet = sRet & sRow
Next I
End If
GetTextFromRangeText = sRet
End Function
if there is anything in A1:B2 cells, this macro works. It breaks when the A1:B2 is empty and the CurrentRegion property returns Empty.

Answer 1

I think you should use these functions to find the last Row/Column
lastRow = Sheets("Sheetname").Cells(Rows.Count, 1).End(xlUp).Row
lastCol = Sheets("Sheetname").Cells(1, Columns.Count).End(xlToLeft).Column
You specify the name of the sheet and the row/columb-number that you want to find the last cell with information, and it return the number of it.
(In the example the last row in first column, and last column in first row are find)
lastCol will give you an Long as an asnwer. If you want to convert this number into the column letter you can use the next function
Function Col_Letter(lngCol As Long) As String
Dim vArr
vArr = Split(Cells(1, lngCol).Address(True, False), "$")
Col_Letter = vArr(0)
End Function
I hope you find this useful

Answer 2

Thanks to user Rosetta, I've come up with this expression for the sought range:
ws.Range("A1:" & ws.Cells.SpecialCells(xlLastCell).Address)