Adding a DataColumn to Dataset

[AndyFreeman]

Ok i am calculating a date diff value i have the value but not too sure how to add the value as a column in the dataset

time_diff=no_of_hours & "hrs  " & mins &"mins"
		
	dcoldiff = New DataColumn ( "Time_diff", getType(String) ) 
	dcoldiff.expression =  & time_diff & 
	dtsOUPC.tables ( "info" ).Columns.Add ( dcoldiff )

This is what i have so far

Any help would be greatly appreciated
Andy