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Hello, Claude, I hope this information helps. If you need any further assistance please don't hesitate to contact me.
RadMultiColumnComboBox offers the EditorControl property which gives you access to the grid in the popup. Thus, you can use the EditorControl.CurrentRow and extract the cells' values in a similar way like you would do it for RadGridView:
https://docs.telerik.com/devtools/winforms/controls/gridview/cells/accessing-cells
object firstCellValue = this.radMultiColumnComboBox1.EditorControl.CurrentRow.Cells[0].Value;Regards,
Dess | Tech Support Engineer, Principal
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