[DXCategory("Action")]
public event RowCellClickEventHandler RowCellClick

<DXCategory("Action")>
Public Event RowCellClick As RowCellClickEventHandler

using System.Collections.Generic;
using System.Windows.Forms;
using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Views.Grid;

namespace DXApplication3
{
    public partial class Form1 : DevExpress.XtraEditors.XtraForm {
        public Form1() {
            InitializeComponent();
            // Add Data Grid
            GridControl gridControl = new GridControl { Parent = this, Dock = DockStyle.Fill };
            GridView gridView = new GridView();
            gridView.OptionsBehavior.Editable = false;
            gridControl.MainView = gridView;
            // Bind to sample data
            List<SomeObject> dataSource = new List<SomeObject>();
            for (int i = 0; i < 4; i++)
                dataSource.Add(new SomeObject { Name = string.Format("Object{0}", i), State = (ObjectState)i });
            gridControl.DataSource = dataSource;

            gridView.RowCellClick += gridView_RowCellClick;
        }

        // When a user clicks any "State" column cell, the cell should change its value
        void gridView_RowCellClick(object sender, RowCellClickEventArgs e) {
            if (e.Column.FieldName == "State") {
                ObjectState state = (ObjectState)e.CellValue;
                ObjectState newState;
                switch (state) {
                    case ObjectState.Normal:
                        newState = ObjectState.Selected;
                        break;
                    case ObjectState.Selected:
                        newState = ObjectState.Highlighted;
                        break;
                    case ObjectState.Highlighted:
                        newState = ObjectState.Hovered;
                        break;
                    default:
                        newState = ObjectState.Normal;
                        break;
                }
                GridView view = sender as GridView;
                view.SetRowCellValue(e.RowHandle, e.Column, newState);
            }
        }

        // Sample data entity
        public class SomeObject {
            public string Name { get; set; }
            public ObjectState State { get; set; }
        }

        // Available values for the "State" column cells
        public enum ObjectState {
            Normal,
            Selected,
            Highlighted,
            Hovered
        }
    }
}

Imports System.Collections.Generic
Imports System.Windows.Forms
Imports DevExpress.XtraGrid
Imports DevExpress.XtraGrid.Views.Grid

Namespace DXApplication3
    Partial Public Class Form1
        Inherits DevExpress.XtraEditors.XtraForm

        Public Sub New()
            InitializeComponent()
            ' Add Data Grid
            Dim gridControl As GridControl = New GridControl With {.Parent = Me, .Dock = DockStyle.Fill}
            Dim gridView As New GridView()
            gridView.OptionsBehavior.Editable = False
            gridControl.MainView = gridView
            ' Bind to sample data
            Dim dataSource As New List(Of SomeObject)()
            For i As Integer = 0 To 3
                dataSource.Add(New SomeObject With {.Name = String.Format("Object{0}", i), .State = CType(i, ObjectState)})
            Next i
            gridControl.DataSource = dataSource

            AddHandler gridView.RowCellClick, AddressOf gridView_RowCellClick
        End Sub

        ' When a user clicks any "State" column cell, the cell should change its value
        Private Sub gridView_RowCellClick(ByVal sender As Object, ByVal e As RowCellClickEventArgs)
            If e.Column.FieldName = "State" Then
                Dim state As ObjectState = CType(e.CellValue, ObjectState)
                Dim newState As ObjectState
                Select Case state
                    Case ObjectState.Normal
                        newState = ObjectState.Selected
                    Case ObjectState.Selected
                        newState = ObjectState.Highlighted
                    Case ObjectState.Highlighted
                        newState = ObjectState.Hovered
                    Case Else
                        newState = ObjectState.Normal
                End Select
                Dim view As GridView = TryCast(sender, GridView)
                view.SetRowCellValue(e.RowHandle, e.Column, newState)
            End If
        End Sub

        ' Sample data entity
        Public Class SomeObject
            Public Property Name() As String
            Public Property State() As ObjectState
        End Class

        ' Available values for the "State" column cells
        Public Enum ObjectState
            Normal
            Selected
            Highlighted
            Hovered
        End Enum
    End Class
End Namespace