The following sample code demonstrates how to open a toolbar collection and display a toolbar in Rhino 4.0. This code assumes that the toolbar collection file is located in the same folder as the plug-in (executable) and has the same file name as the plug-in.

C++

  bool LoadPlugInToolbarCollection()
  {
    bool rc = false;
    // Get our plug-in object.
    CTestPlugIn& plugin = TestPlugIn();


    // Get the plug-in filename.
    ON_wString file_name;
    plugin.GetPlugInFileName( file_name );


    // Split the filename into components.
    wchar_t drive[_MAX_DRIVE];
    wchar_t dir[_MAX_DIR];
    wchar_t fname[_MAX_FNAME];
    _wsplitpath( file_name, drive, dir, fname, 0 );


    // Build the collection filename.
    ON_wString collection_name;
    collection_name.Format( L"%s%s%s.tb", drive, dir, fname );


    // Verify the collection file exists.
    if( !CRhinoFileUtilities::FileExists(collection_name) )
      return rc;


    // Get Rhino's toolbar manager.
    CRhinoAppUiToolBarManager& manager = ::RhinoApp().RhinoUiToolBarManager();


    // See if our collection is already loaded.
    const CRhinoUiToolBarCollection* collection =
               manager.Collection( collection_name, false );
    if( 0 == collection )
    {
      // Open and read our collection file.
      if( manager.ReadFile(collection_name, true, true, true) )
        // Again, see if our collection is already loaded.
        collection = manager.Collection( collection_name, false );
    }


    // If we get here and we still do not have a collection object, bail.
    if( 0 == collection )
      return rc;


    // Find our "default" toolbar in our collection.
    int toolbar_index = collection->FindToolBar( L"Default" );
    if( toolbar_index >= 0 )
    {
      // Get the "default" toolbar object.
      const CRhinoUiToolBar* toolbar = collection->ToolBar( toolbar_index );
      if( toolbar )
      {
        // If the toolbar is not visible, show it.
        if( !toolbar->IsToolBarVisible() )
          rc = manager.ShowToolBar( toolbar, true, false );
      }
    }
    return rc;
  }

VB.NET (Rhino 4)

  Private Function LoadPlugInToolbarCollection() As Boolean
    Dim rc As Boolean = False
    ' Get the plug-in filename.
    Dim file_name As String = PlugIn().OwnerAssembly.Location
    ' Build the collection filename.
    Dim dir As String = System.IO.Path.GetDirectoryName(file_name)
    Dim fname As String = System.IO.Path.GetFileNameWithoutExtension(file_name)
    Dim collection_name As String = System.IO.Path.Combine(dir, fname + ".tb")
    ' Verify the collection file exists.
    If (Not System.IO.File.Exists(collection_name)) Then Return rc


    ' See if our collection is already loaded.
    Dim collection As RMA.UI.IRhinoUiToolBarCollection = _
        RMA.UI.MRhinoUiToolBarManager.Collection(collection_name, False)
    If (collection Is Nothing) Then
      ' Open and read our collection file.
      If (RMA.UI.MRhinoUiToolBarManager.ReadFile(collection_name, True, True, True)) Then
        ' Again, see if our collection is already loaded.
        collection = RMA.UI.MRhinoUiToolBarManager.Collection(collection_name, False)
      End If
    End If


    ' If we get here and we still do not have a collection object, bail.
    If (collection Is Nothing) Then Return rc


    ' Find our "default" toolbar in our collection.
    Dim toolbar_index As Integer = collection.FindToolBar("Default")
    If (toolbar_index >= 0) Then
      ' Get the "default" toolbar object.
      Dim toolbar As RMA.UI.IRhinoUiToolBar = collection.ToolBar(toolbar_index)
      If (toolbar IsNot Nothing) Then
        ' If the toolbar is not visible, show it.
        If (Not toolbar.IsToolBarVisible()) Then
          rc = RMA.UI.MRhinoUiToolBarManager.ShowToolBar(toolbar, True, False)
        End If
      End If
    End If
    Return rc
  End Function

C# (Rhino 4)

  private bool LoadPlugInToolbarCollection()
  {
    bool rc = false;
    // Get the plug-in filename.
    string file_name = PlugIn().OwnerAssembly.Location;
    // Build the collection filename.
    string dir = System.IO.Path.GetDirectoryName(file_name);
    string fname = System.IO.Path.GetFileNameWithoutExtension(file_name);
    string collection_name = System.IO.Path.Combine(dir, fname + ".tb");
    // Verify the collection file exists.
    if( !System.IO.File.Exists(collection_name) )
      return rc;


    // See if our collection is already loaded.
    RMA.UI.IRhinoUiToolBarCollection collection =
        RMA.UI.MRhinoUiToolBarManager.Collection( collection_name, false );
    if( collection == null )
    {
      // Open and read our collection file.
      if( RMA.UI.MRhinoUiToolBarManager.ReadFile( collection_name,
                                                  true,
                                                  true,
                                                  true ) )
        // Again, see if our collection is already loaded.
        collection = RMA.UI.MRhinoUiToolBarManager.Collection( collection_name, false );
    }


    // If we get here and we still do not have a collection object, bail.
    if( collection == null )
      return rc;


    // Find our "default" toolbar in our collection.
    int toolbar_index = collection.FindToolBar( "Default" );
    if( toolbar_index >= 0 )
    {
      // Get the "default" toolbar object.
      RMA.UI.IRhinoUiToolBar toolbar = collection.ToolBar(toolbar_index);
      if( toolbar != null )
      {
        // If the toolbar is not visible, show it.
        if( !toolbar.IsToolBarVisible() )
          rc = RMA.UI.MRhinoUiToolBarManager.ShowToolBar( toolbar, true, false );
      }
    }
    return rc;
  }