Thread: I can' count number of filled cells in row

The code below gives me the row number containing the last filled cell in column A.
How would the equivalent code look like to obtain the column number of the last filled cell in row 1?

LastRow = Range("A" & Rows.Count).End(xlUp).Row

maybe something like this:

lastcol = Cells(1, Columns.Count).End(xlToLeft).Column