diff --git a/Pair/PairV.xaml b/Pair/PairV.xaml
index 5d0dde0..3c1a25c 100644
--- a/Pair/PairV.xaml
+++ b/Pair/PairV.xaml
@@ -27,10 +27,12 @@
          </Grid.ColumnDefinitions>
          <Button Grid.Column="0"
                  Name="Conferma"
-                 Content="{Binding Conferma_Msg}"/>
+                 Content="{Binding Conferma_Msg}"
+                 Command="{Binding ConfermaCmd}"/>
          <Button Grid.Column="1"
                  Name="Annulla"
-                 Content="{Binding Annulla_Msg}"/>
+                 Content="{Binding Annulla_Msg}"
+                 Command="{Binding AnnullaCmd}"/>
       </Grid>
    </StackPanel>
 </UserControl>
diff --git a/Pair/PairV.xaml.vb b/Pair/PairV.xaml.vb
index 61dd6f6..41d616e 100644
--- a/Pair/PairV.xaml.vb
+++ b/Pair/PairV.xaml.vb
@@ -25,14 +25,6 @@ Public Class PairV
 
 #Region "EVENTS"
 
-   Public Sub Conferma_click() Handles Conferma.Click
-      m_PairVM.Conferma()
-   End Sub
-
-   Public Sub Annulla_click() Handles Annulla.Click
-      m_PairVM.Annulla()
-   End Sub
-
    Private Sub PairOption_Changed() Handles PairOption.SelectionChanged, FlipOption1.Click, FlipOption2.Click
       If Not IsNothing(Map.refSceneButtonV.m_PairUC) Then m_PairVM.PairPartsAgain()
    End Sub
diff --git a/Pair/PairVM.vb b/Pair/PairVM.vb
index 01fbeab..1eeacb9 100644
--- a/Pair/PairVM.vb
+++ b/Pair/PairVM.vb
@@ -40,6 +40,26 @@ Public Class PairVM
 
 #End Region    ' Messages
 
+   Private m_ConfermaCmd As ICommand
+   Public ReadOnly Property ConfermaCmd As ICommand
+      Get
+         If m_ConfermaCmd Is Nothing Then
+            m_ConfermaCmd = New Command(AddressOf Conferma)
+         End If
+         Return m_ConfermaCmd
+      End Get
+   End Property
+
+   Private m_AnnullaCmd As ICommand
+   Public ReadOnly Property AnnuallaCmd As ICommand
+      Get
+         If m_AnnullaCmd Is Nothing Then
+            m_AnnullaCmd = New Command(AddressOf Annulla)
+         End If
+         Return m_AnnullaCmd
+      End Get
+   End Property
+
 #End Region    ' Fields & Properties
 
 #Region "CONSTRUCTOR"
@@ -57,7 +77,7 @@ Public Class PairVM
       SolidManagerM.ResetOperationMarks(Map.refSceneHostV.m_nIdPart)
       Map.refSceneButtonV.RemovePairUC()
       EgtDraw()
-      Dim Btn As SceneBtn = DirectCast(Map.refSceneButtonV.DataContext, SceneButtonVM).GetButton(EGT_PAIR)
+      Dim Btn As SceneBtn = Map.refSceneButtonVM.GetButton(EGT_PAIR)
       If TypeOf (Btn) Is _ToggleButton Then
          DirectCast(Btn, _ToggleButton).IsChecked = False
       Else
@@ -69,7 +89,7 @@ Public Class PairVM
       SolidManagerM.ResetOperationMarks(Map.refSceneHostV.m_nIdPart)
       Map.refSceneButtonV.RemovePairUC()
       EgtDraw()
-      Dim Btn As SceneBtn = DirectCast(Map.refSceneButtonV.DataContext, SceneButtonVM).GetButton(EGT_PAIR)
+      Dim Btn As SceneBtn = Map.refSceneButtonVM.GetButton(EGT_PAIR)
       If TypeOf (Btn) Is _ToggleButton Then
          DirectCast(Btn, _ToggleButton).IsChecked = False
       Else
diff --git a/Rotate/RotateV.xaml b/Rotate/RotateV.xaml
index 57daad4..3a82e80 100644
--- a/Rotate/RotateV.xaml
+++ b/Rotate/RotateV.xaml
@@ -29,10 +29,12 @@
          </Grid.ColumnDefinitions>
          <Button Grid.Column="0"
                  Name="Conferma"
-                 Content="{Binding Conferma_Msg}"/>
+                 Content="{Binding Conferma_Msg}"
+                 Command="{Binding ConfermaCmd}"/>
          <Button Grid.Column="1"
                  Name="Annulla"
-                 Content="{Binding Annulla_Msg}"/>
+                 Content="{Binding Annulla_Msg}"
+                 Command="{Binding AnnullaCmd}"/>
       </Grid>
    </StackPanel>
 
diff --git a/Rotate/RotateV.xaml.vb b/Rotate/RotateV.xaml.vb
index 4c58205..c09f407 100644
--- a/Rotate/RotateV.xaml.vb
+++ b/Rotate/RotateV.xaml.vb
@@ -27,15 +27,7 @@
 
    Private Sub Init() Handles Me.Loaded
       Dim PartSolidSel As PartSolidM = SolidManagerM.GetPartSolid(Map.refSceneHostV.m_nIdPart)
-      If IsNothing(PartSolidSel) Then Annulla_click()
-   End Sub
-
-   Private Sub Conferma_click() Handles Conferma.Click
-      m_RotateVM.Conferma()
-   End Sub
-
-   Private Sub Annulla_click() Handles Annulla.Click
-      m_RotateVM.Annulla()
+      If IsNothing(PartSolidSel) Then m_RotateVM.Annulla()
    End Sub
 
    Public Sub AngText_Changed() Handles RotInputData.TextChanged
diff --git a/Rotate/RotateVM.vb b/Rotate/RotateVM.vb
index 2572c31..852b748 100644
--- a/Rotate/RotateVM.vb
+++ b/Rotate/RotateVM.vb
@@ -34,6 +34,27 @@ Public Class RotateVM
 
 #End Region    ' Messages
 
+   Private m_ConfermaCmd As ICommand
+   Public ReadOnly Property ConfermaCmd As ICommand
+      Get
+         If m_ConfermaCmd Is Nothing Then
+            m_ConfermaCmd = New Command(AddressOf Conferma)
+         End If
+         Return m_ConfermaCmd
+      End Get
+   End Property
+
+   Private m_AnnullaCmd As ICommand
+   Public ReadOnly Property AnnullaCmd As ICommand
+      Get
+         If m_AnnullaCmd Is Nothing Then
+            m_AnnullaCmd = New Command(AddressOf Annulla)
+         End If
+         Return m_AnnullaCmd
+      End Get
+   End Property
+
+
 #End Region    ' Fields & Properties
 
 #Region "METHODS"
@@ -42,7 +63,7 @@ Public Class RotateVM
       Map.refSceneButtonV.RemoveRotateUC()
       SolidManagerM.ResetOperationMarks(Map.refSceneHostV.m_nIdPart)
       EgtDraw()
-      Dim Btn As SceneBtn = DirectCast(Map.refSceneButtonV.DataContext, SceneButtonVM).GetButton(EGT_ROTATE)
+      Dim Btn As SceneBtn = Map.refSceneButtonVM.GetButton(EGT_ROTATE)
       If TypeOf (Btn) Is _ToggleButton Then
          DirectCast(Btn, _ToggleButton).IsChecked = False
       Else
@@ -54,7 +75,7 @@ Public Class RotateVM
       Map.refSceneButtonV.RemoveRotateUC()
       SolidManagerM.ResetOperationMarks(Map.refSceneHostV.m_nIdPart)
       EgtDraw()
-      Dim Btn As SceneBtn = DirectCast(Map.refSceneButtonV.DataContext, SceneButtonVM).GetButton(EGT_ROTATE)
+      Dim Btn As SceneBtn = Map.refSceneButtonVM.GetButton(EGT_ROTATE)
       If TypeOf (Btn) Is _ToggleButton Then
          DirectCast(Btn, _ToggleButton).IsChecked = False
       Else
@@ -63,7 +84,7 @@ Public Class RotateVM
    End Sub
 
    Public Sub AngText_Changed()
-      Dim Btn As SceneBtn = DirectCast(Map.refSceneButtonV.DataContext, SceneButtonVM).GetButton(EGT_ROTATE)
+      Dim Btn As SceneBtn = Map.refSceneButtonVM.GetButton(EGT_ROTATE)
       If TypeOf (Btn) Is _ToggleButton Then
          If Not DirectCast(Btn, _ToggleButton).IsChecked Then Return
       Else