Here's a sample of how to use the code tags.

Copy your code to the edit box

Code:
        If e.Control.ToString() Like "System.Windows.Forms.DataGridViewComboBoxEditingControl*" Then
            If DataGrid.CurrentCell.OwningColumn.Name = "colTOOLBROADTYPE" Or _
                    DataGrid.CurrentCell.OwningColumn.Name = "colTOOLSUBTYPE" Or _
                    DataGrid.CurrentCell.OwningColumn.Name = "colTOOLCVSTAG" Then
                Dim myEditingControl As DataGridViewComboBoxEditingControl = TryCast(e.Control, DataGridViewComboBoxEditingControl)
                If myEditingControl IsNot Nothing Then
                    myEditingControl.DropDownStyle = ComboBoxStyle.DropDown

                    ParseComboBoxDropDown(Me.DataGrid.CurrentCellAddress.X)
                    myEditingControl.SelectedItem = Me.DataGrid.Rows(Me.DataGrid.CurrentCellAddress.Y).Cells(Me.DataGrid.CurrentCellAddress.X).Value.ToString()
                End If
            End If
        End If