TDftBitsBlk
#include <PrintTraps.h>
short iOpCode; 2 0 6= opcode for DraftBits
short iError; 2 2 0=noErr; 1=noSuchRsl;
2=opNotImpl
long lReserved; 4 4 (not used )
Notes: TDftBlk defines a subsidiary record used by the TGnlData record in and, in fact, constitute the TGnlData record. It forces draft-mode printing and allows screen dumps through a call to CopyBits. DraftBits printing is immediate, thereby avoiding print spooling and producing faster results.
While it is implemented on the LaserWriter, the call does nothing.
LaserWriters are always in draft mode and always capable of printing
screen dumps.
HPrint is the handle to a TPrint structure that has already been passed by Although speedy and versatile, certain caveats apply when you use
TDftBlk. For example, make this call before bringing up dialog boxes as
it affects their appearance. Also, on the ImageWriter, it disables the
Landscape icon in the Style dialog (Landscape format is not supported) and
the Best, Faster and Draft buttons in the Job dialog.
TDftBlk will do nothing if the printer doesn't have a draft mode, already
prints screen dumps in draft mode, or doesn't print them at all.
You can't use it to print anything but text and screen dumps and everything
on the page has to be oriented along the Y-axis (meaning that you can't go
back over an area, you can't have two objects next to each other, and the top
of one object can't intrude into the bottom of the preceding object.