I am trying to add Expression columns to a DataGrid that perform calculations
using other DateTime fields in the Grid.  It appears from the MSDN library
docs that DataColumn.Expression syntax allows you to compare date fields
using < > and convert them to strings, but nothing else that I can find.  Is
there a way to use custom built functions in Expressions, convert DateTime
values to numeric values within the Expression string, or an alternative to
using Expression?

The simple problem I'm experimenting with is to create an HoursWorked column
based on 2 "Short Time" DateTime columns : ShiftEndTime - ShiftStartTime.  I
would ultimately like a way to perform all functionality normally available
to DateTime objects.

Any help much appreciated.

Matt

I am using VB.NET 2003 Std with an OledbConnection to an Access .mdb file