public void PrintDocument()
{
Visio.Document doc = axDrawingControl1.Document;
Visio.Selection select = doc.Application.ActiveWindow.Selection;
System.Windows.Forms.PrintDialog printDialog = new System.Windows.Forms.PrintDialog();
if (printDialog.ShowDialog() == DialogResult.OK)
{
var PrinterName = printDialog.PrinterSettings.PrinterName;
doc.PrintOut(Visio.VisPrintOutRange.visPrintCurrentView, 1, -1, true, PrinterName);
}
}