How to work with tables in MapBasic?

Question

I try to get data from table use MapBasic:

Dim nCol = "ColumnName"
Fetch First From Untitled
Do While Not EOT(Untitled)
  colValue = Selection.nCol
Note colValue
Fetch Next From Untitled
Loop

Compilation ends success but when i start application in MapInfo get error:

Not defined Selection.nCol

How to work with columns in this case?

Answer 1

I believe you need to use an alias, something like this (untested)

Dim nCol as alias
Fetch First From Untitled
Do While Not EOT(Untitled)
    nCol = Untitled + ".ColumnName"
    colValue = nCol
    Note colValue
    Fetch Next From Untitled
Loop