diff --git a/API_GdbObjSelection.cpp b/API_GdbObjSelection.cpp
new file mode 100644
index 0000000..96dcfa7
--- /dev/null
+++ b/API_GdbObjSelection.cpp
@@ -0,0 +1,54 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2014-2014
+//----------------------------------------------------------------------------
+// File : API_GdbObjects.cpp       Data : 02.09.14        Versione : 1.5i1
+// Contenuto : Funzioni iterazione di DB geometrico per API.
+//
+//
+//
+// Modifiche : 02.09.14 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+//--------------------------- Include ----------------------------------------
+#include "stdafx.h"
+#include "API.h"
+#include "API_Macro.h"
+#include "/EgtDev/Include/EInAPI.h"
+#include "/EgtDev/Include/EGkStringUtils3d.h"
+#include "/EgtDev/Include/EGnStringConverter.h"
+#include "/EgtDev/Include/EgtPointerOwner.h"
+
+using namespace std ;
+
+
+//-----------------------------------------------------------------------------
+BOOL
+ __stdcall EgtIsSelectedObj( int nGseCtx, int nId)
+ {
+   IGeomDB* pGeomDB = GetGeomDB( nGseCtx) ;
+   VERIFY_GEOMDB( pGeomDB, FALSE)
+  // verifico se l'oggetto è selezionato
+   return ( pGeomDB->IsSelectedObj( nId) ? TRUE : FALSE) ;
+ }
+
+//-----------------------------------------------------------------------------
+BOOL
+ __stdcall EgtSelectObj( int nGseCtx, int nId)
+ {
+   IGeomDB* pGeomDB = GetGeomDB( nGseCtx) ;
+   VERIFY_GEOMDB( pGeomDB, FALSE)
+  // seleziono l'oggetto
+   return ( pGeomDB->SelectObj( nId) ? TRUE : FALSE) ;
+ }
+
+//-----------------------------------------------------------------------------
+BOOL
+ __stdcall EgtDeselectObj( int nGseCtx, int nId)
+ {
+   IGeomDB* pGeomDB = GetGeomDB( nGseCtx) ;
+   VERIFY_GEOMDB( pGeomDB, FALSE)
+  // deseleziono l'oggetto
+   return ( pGeomDB->DeselectObj( nId) ? TRUE : FALSE) ;
+ }
diff --git a/API_GdbObjects.cpp b/API_GdbObjects.cpp
index 6cf313d..8859c6b 100644
--- a/API_GdbObjects.cpp
+++ b/API_GdbObjects.cpp
@@ -1,7 +1,7 @@
 //----------------------------------------------------------------------------
 //  EgalTech 2014-2014
 //----------------------------------------------------------------------------
-// File : API_GdbIterate.cpp       Data : 02.09.14        Versione : 1.5i1
+// File : API_GdbObjects.cpp       Data : 02.09.14        Versione : 1.5i1
 // Contenuto : Funzioni iterazione di DB geometrico per API.
 //
 //
diff --git a/API_Scene.cpp b/API_Scene.cpp
index de9df2d..692079b 100644
--- a/API_Scene.cpp
+++ b/API_Scene.cpp
@@ -68,6 +68,17 @@ __stdcall EgtSetBackground( int nGseCtx, int nTopRed, int nTopGreen, int nTopBlu
    return TRUE ;
 }
 
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtResize( int nGseCtx, int nW, int nH)
+{
+   IEGrScene* pScene = GetScene( nGseCtx) ;
+   VERIFY_SCENE( pScene, FALSE)
+  // eseguo resize
+   pScene->Resize( nW, nH) ;
+   return TRUE ;
+}
+
 //-----------------------------------------------------------------------------
 BOOL
 __stdcall EgtDraw( int nGseCtx)
@@ -84,13 +95,32 @@ __stdcall EgtDraw( int nGseCtx)
 
 //-----------------------------------------------------------------------------
 BOOL
-__stdcall EgtResize( int nGseCtx, int nW, int nH)
+__stdcall EgtSelect( int nGseCtx, int nWinX, int nWinY, int nSelW, int nSelH, int* pnSel)
 {
-   IEGrScene* pScene = GetScene( nGseCtx) ;
-   VERIFY_SCENE( pScene, FALSE)
-  // eseguo resize
-   pScene->Resize( nW, nH) ;
-   return TRUE ;
+   GseContext* pGseCtx = GetGseContext( nGseCtx) ;
+   VERIFY_CTX_SCENE( pGseCtx, FALSE)
+  // eseguo la selezione
+   return ( pGseCtx->m_pScene->Select( Point3d( nWinX, nWinY), nSelW, nSelH, *pnSel) ? TRUE : FALSE) ;
+}
+
+//-----------------------------------------------------------------------------
+int
+__stdcall EgtGetFirstSelectedObj( int nGseCtx)
+{
+   GseContext* pGseCtx = GetGseContext( nGseCtx) ;
+   VERIFY_CTX_SCENE( pGseCtx, FALSE)
+  // restituisco il primo oggetto selezionato
+   return pGseCtx->m_pScene->GetFirstSelectedObj() ;
+}
+
+//-----------------------------------------------------------------------------
+int
+__stdcall EgtGetNextSelectedObj( int nGseCtx)
+{
+   GseContext* pGseCtx = GetGseContext( nGseCtx) ;
+   VERIFY_CTX_SCENE( pGseCtx, FALSE)
+  // restituisco il successivo oggetto selezionato
+   return pGseCtx->m_pScene->GetNextSelectedObj() ;
 }
 
 //-----------------------------------------------------------------------------
@@ -170,6 +200,32 @@ __stdcall EgtZoomOnPoint( int nGseCtx, int nWinX, int nWinY, double dCoeff, BOOL
    return TRUE ;
 }
 
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtSetGeoLine( int nGseCtx, const double ptP1[3], const double ptP2[3], BOOL bRedraw)
+{
+   GseContext* pGseCtx = GetGseContext( nGseCtx) ;
+   VERIFY_CTX_SCENE( pGseCtx, FALSE)
+  // disegno linea per distanza o similari
+   pGseCtx->m_pScene->SetGeoLine( Point3d( ptP1), Point3d( ptP2)) ;
+   if ( bRedraw)
+      pGseCtx->m_pScene->RedrawWindow() ;
+   return TRUE ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtResetGeoLine( int nGseCtx, BOOL bRedraw)
+{
+   GseContext* pGseCtx = GetGseContext( nGseCtx) ;
+   VERIFY_CTX_SCENE( pGseCtx, FALSE)
+  // cancello linea per distanza o similari 
+   pGseCtx->m_pScene->ResetGeoLine() ;
+   if ( bRedraw)
+      pGseCtx->m_pScene->RedrawWindow() ;
+   return TRUE ;
+}
+
 //-----------------------------------------------------------------------------
 BOOL
 __stdcall EgtSetWinRect( int nGseCtx, int nPrevX, int nPrevY, int nCurrX, int nCurrY, BOOL bRedraw)
@@ -241,7 +297,7 @@ __stdcall EgtSetGenericView( int nGseCtx, double dAngVertDeg, double dAngHorizDe
 
 //-----------------------------------------------------------------------------
 BOOL
-__stdcall EgtSetViewCenter( int nGseCtx, double ptP[3], BOOL bRedraw)
+__stdcall EgtSetViewCenter( int nGseCtx, const double ptP[3], BOOL bRedraw)
 {
    GseContext* pGseCtx = GetGseContext( nGseCtx) ;
    VERIFY_CTX_SCENE( pGseCtx, FALSE)
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 68b8e9d..b264170 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ
diff --git a/EgtInterface.vcxproj b/EgtInterface.vcxproj
index 10e65d5..10298df 100644
--- a/EgtInterface.vcxproj
+++ b/EgtInterface.vcxproj
@@ -200,6 +200,7 @@ copy $(TargetPath) \EgtProg\Dll64</Command>
     <ClCompile Include="API_GdbModify.cpp" />
     <ClCompile Include="API_GdbObjAttribs.cpp" />
     <ClCompile Include="API_GdbObjects.cpp" />
+    <ClCompile Include="API_GdbObjSelection.cpp" />
     <ClCompile Include="API_General.cpp" />
     <ClCompile Include="API_GdbCreate.cpp" />
     <ClCompile Include="API_GeomDB.cpp" />
diff --git a/EgtInterface.vcxproj.filters b/EgtInterface.vcxproj.filters
index 5a0655b..1eb6f78 100644
--- a/EgtInterface.vcxproj.filters
+++ b/EgtInterface.vcxproj.filters
@@ -125,6 +125,9 @@
     <ClCompile Include="LUA_GdbModify.cpp">
       <Filter>File di origine</Filter>
     </ClCompile>
+    <ClCompile Include="API_GdbObjSelection.cpp">
+      <Filter>File di origine</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="EgtInterface.rc">