Gentlemen

I am using the following controls PrintPreviewControl, PrintDialog and PrintDocument. In the method PrintDocument1.PrintPage

To fill the PrintPreviewControl realized the following action PrintPreviewControl1.Document = PrintDocument1

Until then all beautiful
after that I block, nothing comes out

Questions:
1- How to print the document generated in PrintPreviewControl
2- Printing selection
3- How to print some pages
4- How to print the current page

PS: When I try to use the PrintPreviewControl.Document.Print or PrintDocument.Print command in both cases it rewrites the document, why?