get the last used column and row excel with vb.net

Hello,

I want to know how can I get the last row and column with data in Excel through vb.net. I've developed an application to automate Excel and make
some files and I need to know these values in order to apply correct format.

Thanks in advance.
nuberunAsked:
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dapcomCommented:
something like:

strAddress=Range("A1").SpecialCells(xlLastCell).Address
or
iCol=Range("A1").SpecialCells(xlLastCell).Column
iRow=Range("A1").SpecialCells(xlLastCell).Row

should help?

xlLastCell=11 if you don't have the constants...

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dapcomCommented:
NB: with automation I guess you need to use a ref to the corrsponding sheet, workbook or applicationto use the Range property. I guess you already have one:

ex:
myExcelApp.WorkBooks(1).Sheets(1).range...

or myWorkbook.Sheets(1).range

mySheet.Range...
nuberunAuthor Commented:
And how can I also get the letter of this column, for example AA.
Thanks
dapcomCommented:
I don't know if there's a direct way to do that, I usually profer using the column numbers and change to an address when needed.

Anyway here is a way to get the letter from the address:

Public Sub test()
    Dim strAddress As String
    Dim strColLetter As String
    strAddress = Range("B2").EntireColumn.AddressLocal            'return "$B:$B"
    strColLetter = Mid$(strAddress, 2, InStr(strAddress, ":") - 2)  'get rid of first $ and read until ':'
    MsgBox strColLetter
End Sub

But something tells me an excel function must exist for that?
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