I have an application that it would look easier to separate columns by a line, possibly by changing the border properties?

If we understand your question right, you need thick vertical grid lines. iGrid has the GridLines object property you should use for that. For instance, we could set the vertical grid lines width to 3 pixels and remove the horizontal grid lines at all using this code:


You could also get some special "effects" using the Color sub-property. For instance, you could set the grid lines color to the color of the grid background, and in this case you would see empty vertical spaces between your columns.

That sounds like thick vertical or horizontal lines for the whole grid. I just want a vertical line along one side of the column. Much like a cell border property.

Then use the universal solution - custom drawing!
See the CustomDrawCellBackground/CustomDrawCellForeground events.