In MultiColumnComboBox, GridListControl has been used as Popup Control. It is possible to display CheckBox in GridListControl and maintain its Check state based on user selection, by handling its events named SelectionChanged and QueryCellInfo.
This event will be triggered when the Selected value is changed in MultiColumnComboBox.
This event will be triggered when the GridListControl is displayed.
Following code examples demonstrates the same.
Figure 1. Adding CheckBox to the MultiColumnCombobox with image
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