public void ShowDesigner(PresentationInfo info, bool Editing, bool JustCreatedPresentation)
        {
            using (PresentationDesignerForm designer = new PresentationDesignerForm(info))
            {
                designer.JustCreatedPresentation = JustCreatedPresentation; // Признак только что созданной презентации
                InitAndShowDesigner(designer, Editing);
            }

            if (!this.IsDisposed)
                this.Show();
        }
 private void InitAndShowDesigner(PresentationDesignerForm designer, bool Editing)
 {
     Cursor = Cursors.WaitCursor;
     designer.Init(Editing);
     this.Hide();
     Cursor = Cursors.Default;
     designer.ShowDialog();
 }