Public Class MedicalViewerUIChangedEventArgs 
   Inherits System.EventArgs

Dim instance As MedicalViewerUIChangedEventArgs

public class MedicalViewerUIChangedEventArgs : System.EventArgs 

public ref class MedicalViewerUIChangedEventArgs : public System.EventArgs 

Public Sub CustomRectangleExample()
      Dim form As GetDispalyedClippedImageRectangleMainForm = New GetDispalyedClippedImageRectangleMainForm()
      form.ShowDialog()
   End Sub

   ' MainForm1 will be the owner of the medical viewer control.
   Private Class CustomRectangleMainForm : Inherits Form
      Public _medicalViewer As MedicalViewer

      Private Sub MedicalViewerForm_SizeChanged(ByVal sender As Object, ByVal e As EventArgs)
         _medicalViewer.Size = New Size(Me.ClientRectangle.Right, Me.ClientRectangle.Bottom)
      End Sub

      Public Sub New()
         Dim _codecs As RasterCodecs = New RasterCodecs()
         Dim _image As RasterImage

         ' Create the medical viewer and adjust some properties.
         _medicalViewer = New MedicalViewer()
         _medicalViewer.Rows = 2
         _medicalViewer.Columns = 1
         _medicalViewer.Location = New Point(0, 0)
         _medicalViewer.Size = New Size(Me.ClientRectangle.Right, Me.ClientRectangle.Bottom)


         ' Load an image and then add it to the control.
         _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "image2.cmp"))
         Dim cell As MedicalViewerMultiCell = New MedicalViewerMultiCell()
         _medicalViewer.Cells.Add(cell)

         ' add some action that will be used to change the properties of the images inside the control.
         cell.AddAction(MedicalViewerActionType.Scale)
         cell.AddAction(MedicalViewerActionType.Offset)

         ' assign the added actions to a mouse button, meaning that when the user click and drag the mouse button, the associated action will be activated.
         cell.SetAction(MedicalViewerActionType.Offset, MedicalViewerMouseButtons.Right, MedicalViewerActionFlags.Active Or MedicalViewerActionFlags.RealTime)
         cell.SetAction(MedicalViewerActionType.Scale, MedicalViewerMouseButtons.Middle, MedicalViewerActionFlags.Active Or MedicalViewerActionFlags.RealTime)



         Controls.Add(_medicalViewer)
         _medicalViewer.Dock = DockStyle.Fill

         AddHandler cell.PostPaint, AddressOf Viewer_PostPaint
         AddHandler cell.UIChanged, AddressOf Viewer_UIChanged
      End Sub

      Private _color As Color
      Private Sub Viewer_UIChanged(ByVal sender As Object, ByVal e As MedicalViewerUIChangedEventArgs)
         If e.ActionType = MedicalViewerActionType.Offset Then
            If e.ActionState = MedicalViewerActionStatus.Progress Then
               _color = Color.Blue
            Else
               _color = Color.Yellow
            End If
         End If
      End Sub

      Private Sub Viewer_PostPaint(ByVal sender As Object, ByVal e As MedicalViewerPaintInformationEventArgs)
         e.Graphics.DrawRectangle(New Pen(_color), e.ImageRectangle)
      End Sub
   End Class

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void CustomRectangleExample()
{
    GetDispalyedClippedImageRectangleMainForm form = new GetDispalyedClippedImageRectangleMainForm();
    form.ShowDialog();
}

// MainForm1 will be the owner of the medical viewer control.
class CustomRectangleMainForm : Form
{
    public MedicalViewer _medicalViewer;

    void MedicalViewerForm_SizeChanged(object sender, EventArgs e)
    {
        _medicalViewer.Size = new Size(this.ClientRectangle.Right, this.ClientRectangle.Bottom);
    }

    public CustomRectangleMainForm()
    {
        RasterCodecs _codecs = new RasterCodecs();
        RasterImage _image;

        // Create the medical viewer and adjust some properties.
        _medicalViewer = new MedicalViewer();
        _medicalViewer.Rows = 2;
        _medicalViewer.Columns = 1;
        _medicalViewer.Location = new Point(0, 0);
        _medicalViewer.Size = new Size(this.ClientRectangle.Right, this.ClientRectangle.Bottom);


        // Load an image and then add it to the control.
        _image = _codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "image2.cmp");
        MedicalViewerMultiCell cell = new MedicalViewerMultiCell();
        _medicalViewer.Cells.Add(cell);

        // add some action that will be used to change the properties of the images inside the control.
        cell.AddAction(MedicalViewerActionType.Scale);
        cell.AddAction(MedicalViewerActionType.Offset);

        // assign the added actions to a mouse button, meaning that when the user click and drag the mouse button, the associated action will be activated.
        cell.SetAction(MedicalViewerActionType.Offset, MedicalViewerMouseButtons.Right, MedicalViewerActionFlags.Active | MedicalViewerActionFlags.RealTime);
        cell.SetAction(MedicalViewerActionType.Scale, MedicalViewerMouseButtons.Middle, MedicalViewerActionFlags.Active | MedicalViewerActionFlags.RealTime);



        Controls.Add(_medicalViewer);
        _medicalViewer.Dock = DockStyle.Fill;

        cell.PostPaint += new EventHandler<MedicalViewerPaintInformationEventArgs>(Viewer_PostPaint);
        cell.UIChanged += new EventHandler<MedicalViewerUIChangedEventArgs>(Viewer_UIChanged);
    }

    Color _color;
    void Viewer_UIChanged(object sender, MedicalViewerUIChangedEventArgs e)
    {
        if (e.ActionType == MedicalViewerActionType.Offset)
        {
            if (e.ActionState == MedicalViewerActionStatus.Progress)
                _color = Color.Blue;
            else
                _color = Color.Yellow;
        }
    }

    void Viewer_PostPaint(object sender, MedicalViewerPaintInformationEventArgs e)
    {
        e.Graphics.DrawRectangle(new Pen(_color), e.ImageRectangle);
    }
}