How do you update a fox table with an empty date from dotnet?

Can you do it with parameters, or do you have to build up the insert string?

OleDbCommand cmd = new OleDbCommand("UPDATE myTable SET myDate = ? WHERE id = ?",myConn);
OleDbParameter p = cmd.Parameters.Add("?myDate",OleDbType.Date);
//p.Value = //What should this be?

or

OleDbCommand cmd = new OleDbCommand("UPDATE myTable SET myDate = {} WHERE id = 1",myConn);

I would rather use parameters if there is a way.