title: how change type of column in radgridview
body: <p>I mean - I write data to database using RadMaskedEditBox. But I load data from database using generated from <code>Add new data source</code> table adapter. So the data from maskededitbox is in the 5th column(I've got 7 columns). I need a GridViewMaskBoxColumn. But new column can be added only as the last column. So I delete column which(contains data from radmaskededitbox) from datagrid, copy its data to gridviewmaskboxcolumn and the add it to datagrid. But when I call update method - all the data from new column dissapears.</p>
  
  <p>How to solve this problem?</p>