add control to datagridview

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C#

Hi,
There is a control called nbText (which formats numbers) which inherits from DataGridViewAutoFilter.DataGridViewNumberBox.
How can I place this nbText control inside a datagridview (dgv) control in windows?

The following seems to compile but I am unable to add a number into the dgv textbox in the row.

DataGridViewAutoFilter.DataGridViewNumberBox nbValue = new DataGridViewAutoFilter.DataGridViewNumberBox();            
            nbValue.Name = "nbCashValue";
            nbValue.HeaderText = "nbValue";
            nbValue.Width = 100;
            nbValue.DataPropertyName = "nbValue";

            dgv.Columns.Add(nbValue);

Everytime I add a value to that cell in the column of the dgv, the error is:
Object reference not set to an instance of an object.

How can I solve this error please?

Thanks