>Sorry for the mixed up. I need 3 columns in the grid table. The problem is when i setup the grid columncount = 3, there is one extra column appeared in the grid table. This extra column is without the caption "Header1" while the first 3 columns have the word "Header1'.
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>Regardless of the number i fill in for grid.columncount, there is always one extra column given. thanks

What is the width of the grid compared to the sum of the widths of the three columns? Extra space will look like another column, but it's just extra space. You can either widen the columns to take up the entire room, or decrease the width of the grid.