Calculate the sum of rows using macro

Hello,
I need some help with the folowing problem. I have a table with changing length of rows and columns. I need to calculate the sums of the rows and columns and write it in the next blank cell. I managed to write a working macro for the columns but I have a problem with the rows. Could you please help? Here are the two codes...

Sub AutoSumCol()
Dim lngColumn As Long
Dim lngLastRow As Long
For lngColumn = 1 To Range("A1").End(xlToRight).Column
lngLastRow = Cells(1, lngColumn).End(xlDown).Row
Cells(lngLastRow + 1, lngColumn).Formula = "=Sum(" & Cells(1, lngColumn).Address & ":" & _
Cells(lngLastRow, lngColumn).Address & ")"
Next lngColumn
End Sub

Sub AutoSumRow()
Dim lngRow As Long
Dim lngLastColumn As Long
For lngRow = 1 To Range("A1").End(xlToRight).Row
lngLastColumn = Cells(1, lngRow).End(xlDown).Column
Cells(lngLastColumn + 1, lngRow).Formula = "=Sum(" & Cells(1, lngRow).Address & ":" & _
Cells(lngLastColumn, lngRow).Address & ")"
Next lngRow
End Sub

Thanks :)