>Hi J.Crescencio Flores
>
>I know how to put a value in a Excel sheet, as below:
>
>EXCEL_FILE.APPLICATION.CELLS(1,4).VALUE = "POSTED"
>
>but... how can i change the FONTS/BACK COLOR of this cell (column/range of cells)
>
>And where (www) can i find more function key about that as COLUMN.WEIGHT, FONTS .......

You can get more information about Excel's object model on http://www.msdn.microsoft.com/office . Look for the developer documentation and samples.