>How can I determine settings for printer paper size such as paper form name, paper size (in cm), left and right margins, numbers of rows and columns (I want to print with for example @prow()+1 ...)? Custom paper size is also important.

For printer margins see http://www.berezniker.com/content/pages/visual-foxpro/determine-printer-margins-programmatically. For the rest you'll have to get DEVMODE structure for the printer. See Re: DocumentProperties anyone? Thread #1010251 Message #1011495, for example.