H Toan,

instead of using dot notation you can use the Modify function. It supports the modification of columns by number:

dw_1.Modify ("#" + string (i) + ".color='" + string (rgb(0, 0, 128)) + "'")

If you do that in this way you have to keep in mind:

• Datawindow.Column.Count is the number of the columns selected from the database or defined in column specifications. But it is possible that there is no column object for a datawindow column. In tis case if you try to modify the column object properties the Modify function will fail and the return value is an error message. (BTW: dot notation will throw an exception in this case)
• It is also possible to insert more than one column object for the same column in a datawindow. In this case a Modify that specifies the column by number will only change one of the column objects (if I remember right it is the first in the object list).

A way to avoid such problems is to loop through Datawindow.Objects . It lists tab separated all objects (also texts, lines, ...) so you have to parse the list and also check for each object if it is a column (objectname.type). Because of this it is slower.

HTH,

René