How to color a specific cell in DataGrid without coloring entire coloring

Hi, Given a cell's row and column, I need to create a function COLOR_CELL that will alter the foreground and background colors of only the selected cell. The function could be invoked any time a push button is clicked and not necessarily during the first grid load. The function should have the following parameters: COLOR_CELL(Row as integer, Col as Integer, ForegroundColor as color, BackgroundColor as color) I have looked at some examples in this site and I honstly could not understand them well! Please specify your suggestion in VB.NET not in C#. Thanks. Ekareem

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