How do i make my program know if a certain entry in a table doesnt exists, aka null, aka nothing?? I tried doing

Code:
If table.rows(1)(1).contains("") Then
Do it
End If
and i also tried


Code:
If table.rows(1)(1).contains(nothing) Then
do it
end if
Both times i got the same error "Public member on "Contains" on type double not found"....


I imported an excel database, into the table, so i don't know what it thinks it is, or what the data type is... SO any information about this, or any suggestions would help!