[REALLY URGENT] blob datacolumn

Im creating a datatable manually and I want in one column to place a picture.
what type has to be the datacolumn?

VB Code:

mydataview.Table.Columns.Add(New DataColumn("My picture", Type.GetType("System.???????")))

Well, I think it is a Byte Array. I'm not sure how you would get the type of that.

I think it should be an object datatype

VB Code:

Dim myTable As New DataTable
myTable.Columns.Add("columnName", System.Type.GetType("System.Object"))