Nope, did not work, I think I found the answer, but will have to go check first:
dim tbl as datatable
dim col1 as datacolumn
dim col2 as datacolumn
col1.columnname = "Column1"
col1.caption = "Column1"
col2.columnname = "Column2"
col2.caption = "Column2"
tbl.columns.add(col1)...