Woody,
The System.Windows.Forms.DataGrid automatically (internally) uses an
ErrorProvider, when bound to a DataTable.
You can set DataRow.RowError to have an error icon on the current row in the
grid, you can use DataRow.SetColumnError on individual fields within a row.
You can have your own classes provide the same information for the grid by
implementing the System.CompontModel.IDataErrorInfo interface.
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