This is old, but I thought I would try to answer it one way or another since I had the same question.
, DataTable DataGridViewComboBoxColumn. DataColumn System.Data, DataGridView * Columns System.Windows.Forms.
, : DataTable DataGridView, DataTable DataGridView . Columns DataGridView, , DataTable . , "ColumnType". - DataGridViewTextBoxColumn, DataGridViewComboBoxColumn.