myPreview->nodesXYZ[0].z = myDlg->myZ->GetValue();
if (!mySimulation)
mySimulation = new SMESHGUI_MeshEditPreview(SMESH::GetViewWindow( mySMESHGUI ));
myPreview->nodesXYZ[0].z = myDlg->myZ->GetValue();
if (!mySimulation)
mySimulation = new SMESHGUI_MeshEditPreview(SMESH::GetViewWindow( mySMESHGUI ));