How to: Obtain the Document Position under the Mouse Cursor
The RichEditControl allows you to determine the position in the document that corresponds to any given point with known screen coordinates. To accomplish this task, use the RichEditControl.GetPositionFromPoint method.
The document position which the mouse pointer hovers over, is displayed in the form title bar.
Imports DevExpress.Office.Utils
Imports DevExpress.XtraRichEdit.API.Native
Imports System.Drawing
Imports System.Windows.Forms
AddHandler Me.richEditControl1.MouseMove, AddressOf richEditControl1_MouseMove
Private Sub richEditControl1_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs)
Dim docPoint As Point = Units.PixelsToDocuments(e.Location, richEditControl1.DpiX, richEditControl1.DpiY)
Dim pos As DocumentPosition = richEditControl1.GetPositionFromPoint(docPoint)
If pos IsNot Nothing Then
Me.Text = System.String.Format("Mouse is over position {0}",pos)
Else
Me.Text = ""
End If
End Sub