void=deleteCol(col1:integer, col2:integer)
The function deletes columns in the actual sheet in the xls document.

Parameters
Col1 is a number of the column that we want to start deleting with. Col2 is a number of the column that we want to finish deleting with. Col1<=col2 is valid. If we delete the columns all the columns on the right will be shifted left.

Example - Director
global xls
xls.deleteCol(7,9)

Example - Authorware
CallObject(xls; "deleteCol" ; 7; 9)