If control spans two or more columns, the TableLayoutPanel.GetColumn(Control) method will return the lowest column index.

The column position value is zero based, so you can use it as an index for the array returned by TableLayoutPanel.GetColumnWidths.

This method is called by the Column property, which the panel adds to its child controls at design time.

To get the actual position of control, even when its position is determined by TableLayoutPanel.LayoutEngine, call the TableLayoutPanel.GetPositionFromControl(Control) method.