combining two columns in a datagrid

[Jagdip Singh Ajimal]

I have a datagrid that I create from a query on a database. In this
datagrid are two columns, appTimeHour and appTimeMin for the hour and
minute of the appointments.
I would like to create a new column called Time, where I combine these
two columns into one. How can I do this?

Any help would be greatly appriciated

Jagdip Singh Ajimal