qbasic.hlp (Topic list)
PCOPY Statement
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Copies one video memory page to another.
 
PCOPY sourcepage%,destinationpage%
 
    ■ sourcepage%         The number of a video memory page to copy.
    ■ destinationpage%    The number of the video memory page to copy to.
 
    ■ The value that identifies the video page is determined by the size
      of video memory and the current screen mode.
 
Example:
    PCOPY 1, 3
 
See Also    SCREEN    Screen Modes