>>Right-click on grid, select edit, click on needed control in Controls toolbar, click on column. You may repeat this operation as many times as you want.
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>PMFJI, but since we're on the subject I've always wondered how you remove an unwanted control after you've added the one you want. Say you start with a text box in a column, then add a combo box. I've never been able to find a way to delete the text box. Do you know of a way to do this?

Find the unwanted control in the Property sheet, select it there , then click on the title bar of the FormDesigner then press Del. It is gone... :)