If you want to select a variable range containing all headers cells:
Dim sht as WorkSheet
Set sht = This Workbook.Sheets("Data")
'Range(Cells(1,1),Cells(1,Columns.Count).End(xlToLeft)).Select '<<< NOT ROBUST
sht.Range(sht.Cells(1,1),sht.Cells(1,Columns.Count).End(xlToLeft)).Select
...as long as there's no other content on that row.
EDIT: updated to stress that when using Range(Cells(...), Cells(...))
it's good practice to qualify both Range
and Cells
with a worksheet reference.