Getting DataGrid Column Name

How can I get the Column Name from a datagrid when a cell is selected. I have the column number of the selected cell and I have been trying to do something like:

VB Code:

myGrid.Column(selectedCell.ColumnNumber).Name

I know this code is invalid, but it illustrates what I am trying to do. Anyone do this before?

I can think of two ways.
First refering to the datagrid datasource and second in case of using tablestyles refering to DatagridColumnStyle of GirdColumnStyles collection.