PrnSetSize( nWidth, nLenght )-> <nil>
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 PARAMETER:

  <nWidth>      Specifies the paper width, in tenths of a millimeter

  <nLength>     Specifies a paper length, in tenths of a millimeter


 DESCRIPTION:

  PrnSetSize() invokes the PrinterSetUp dialog, if the printer has not
  already been initialized before. It then sets the 1bdmPaperWidth and 
  1bdmPaperLenght members of the DEVMODE structure to the given values


 SOURCE:  

  SOURCE\WINAPI\PRINTDC.C