public enum SchedulerHitTest : long

Public Enum SchedulerHitTest As Long

using DevExpress.XtraScheduler;
using DevExpress.XtraScheduler.Drawing;
using System;
using System.Drawing;
using System.Windows.Forms;
        private void schedulerControl1_MouseMove(object sender, MouseEventArgs e)
        {
            SchedulerControl scheduler = sender as SchedulerControl;
            if (scheduler == null) return;

            Point pos = new Point(e.X, e.Y);
            SchedulerViewInfoBase viewInfo = schedulerControl1.ActiveView.ViewInfo;
            SchedulerHitInfo hitInfo = viewInfo.CalcHitInfo(pos, false);

            if (hitInfo.HitTest == SchedulerHitTest.AppointmentContent)
            {
                Appointment apt = ((AppointmentViewInfo)hitInfo.ViewInfo).Appointment;
                Text = apt.Subject;
            }
            else if (scheduler.ActiveView.Type == SchedulerViewType.Day && hitInfo.HitTest == SchedulerHitTest.Cell)
            {
                int diff = pos.Y - hitInfo.ViewInfo.Bounds.Y;
                long ticksPerPixel = hitInfo.ViewInfo.Interval.Duration.Ticks /
                    hitInfo.ViewInfo.Bounds.Height;
                long ticksCount = ticksPerPixel * diff;
                DateTime actualTime = hitInfo.ViewInfo.Interval.Start.AddTicks(ticksCount);
                Text = actualTime.ToString();
            }
            else if (hitInfo.HitTest == SchedulerHitTest.None)
            {
                Text = Application.ProductName;
            }
            else Text = string.Empty;
        }

        private void schedulerControl1_DragOver(object sender, DragEventArgs e)
        {
            SchedulerControl scheduler = sender as SchedulerControl;
            if (scheduler == null) return;

            Point p = scheduler.PointToClient(new Point(e.X, e.Y));
            SchedulerHitInfo info = scheduler.DayView.ViewInfo.CalcHitInfo(p, true);
            if (info.HitTest == SchedulerHitTest.AllDayArea)
                e.Effect = DragDropEffects.None;
        }

Imports DevExpress.XtraScheduler
Imports DevExpress.XtraScheduler.Drawing
Imports System
Imports System.Drawing
Imports System.Windows.Forms
        Private Sub schedulerControl1_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs) Handles schedulerControl1.MouseMove
            Dim scheduler As SchedulerControl = TryCast(sender, SchedulerControl)
            If scheduler Is Nothing Then
                Return
            End If

            Dim pos As New Point(e.X, e.Y)
            Dim viewInfo As SchedulerViewInfoBase = schedulerControl1.ActiveView.ViewInfo
            Dim hitInfo As SchedulerHitInfo = viewInfo.CalcHitInfo(pos, False)

            If hitInfo.HitTest = SchedulerHitTest.AppointmentContent Then
                Dim apt As Appointment = CType(hitInfo.ViewInfo, AppointmentViewInfo).Appointment
                Text = apt.Subject
            ElseIf scheduler.ActiveView.Type = SchedulerViewType.Day AndAlso hitInfo.HitTest = SchedulerHitTest.Cell Then
                Dim diff As Integer = pos.Y - hitInfo.ViewInfo.Bounds.Y
                Dim ticksPerPixel = hitInfo.ViewInfo.Interval.Duration.Ticks / hitInfo.ViewInfo.Bounds.Height
                Dim ticksCount = CType(ticksPerPixel * diff, Long)
                Dim actualTime As Date = hitInfo.ViewInfo.Interval.Start.AddTicks(ticksCount)
                Text = actualTime.ToString()
            ElseIf hitInfo.HitTest = SchedulerHitTest.None Then
                Text = Application.ProductName
            Else
                Text = String.Empty
            End If
        End Sub

        Private Sub schedulerControl1_DragOver(ByVal sender As Object, ByVal e As DragEventArgs) Handles schedulerControl1.DragOver
            Dim scheduler As SchedulerControl = TryCast(sender, SchedulerControl)
            If scheduler Is Nothing Then
                Return
            End If

            Dim p As Point = scheduler.PointToClient(New Point(e.X, e.Y))
            Dim info As SchedulerHitInfo = scheduler.DayView.ViewInfo.CalcHitInfo(p, True)
            If info.HitTest = SchedulerHitTest.AllDayArea Then
                e.Effect = DragDropEffects.None
            End If
        End Sub