英語翻譯
A printing mechanism comprises a printhead that defines a printzone,and a tray adapted to support at least one sheet of print media.The tray is adapted to move through the printzone during printing by the printhead on the sheet.
The full-blown print handling of a document/view class is inappropriate; in other cases,such as a dialog-based application,it is not available directly via the MFC library.This little class provides for some simple line-printer-simulation output,suitable for printing files,simple text,etc.
Constructs a printer object with the DC of a printer.This is typically obtained from the CPrintDialog by using the flag PD_RETURNDC,then using CDC::FromHandle to get an MFC object for the DC.This terminates the print job.It calls the necessary EndPage and EndDoc functions.If the CPrinter object is destroyed while a print job is active,the destructor will call this method.
This function can be called by a subclass's PageHeading routine to get the current page number.This method can be overridden in a subclass to print a page heading.The default effect in the base class is to print the program name on the left and the page number on the right.This method prints a single line to the printer.No attempt is made to do line wrapping.Implicit left and top margins are assumed.If the line would overflow the existing printable page area,the current page is terminated and a new page is started.The page number is incremented,and heading is printed on the new page
In the base class,this establishes the printer font as the stock ANSI_FIXED_FONT.A subclass may override this to provide its own font.Starts a document on the printer.This must be called before any PrintLine calls are made.This sets up default margins and performs the necessary ::StartDoc call