The Printing structure contains functions to control a printer device context.
structure Printing : sig type HDC type DOCINFO = { docName: string, output: string option, dType: string option} val StartDoc : HDC * DOCINFO -> int val StartPage : HDC -> unit val AbortDoc : HDC -> unit val EndDoc : HDC -> unit val EndPage : HDC -> unit datatype WMPrintOption = PRF_CHECKVISIBLE | PRF_NONCLIENT | PRF_CLIENT | PRF_ERASEBKGND | PRF_CHILDREN | PRF_OWNED end