Windows 3.1 Device Drivers (ddag31qh.hlp) (Table of Contents; Topic list)
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RESETDEVICE
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#define RESETDEVICE 128 
short Control(lpDevice, RESETDEVICE, lpDeviceOld, NULL)
LPPDEVICE lpDevice;
LPPDEVICE lpDeviceOld;
 
The RESETDEVICE escape resets the device context by copying information that
is specific to the current print job from the original physical device
structure to the new one. GDI calls this escape whenever an application
calls the ResetDC function (GDI.376).
 
Printer drivers that can reset print-job options (such as orientation and
paper source) during a single print job must support the RESETDEVICE
escape.
 
Parameter    Description
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lpDevice     Points to a PDEVICE structure specifying the new physical
             device.
 
lpDeviceOld  Points to a PDEVICE structure containing the device-specific
             settings to be copied to the new physical device structure.
 
Return Value
 
The return value is TRUE if the function is successful. Otherwise, it is
FALSE.
 
Comments
 
The RESETDEVICE escape must copy all information required to continue the
current print job to the new physical device structure. This includes
information such as the print-job number and record of downloaded resources,
but does not include information about the environment (such as orientation
and paper source). GDI calls the Enable function to set the environment for
the new physical device structure before calling this escape.
 
After the RESETDEVICE escape returns, GDI immediately calls the Disable
function with the old physical device structure. RESETDEVICE must ensure
that resources copied to the new physical device structure are not deleted
on the subsequent call to Disable. For example, if the Disable function
frees any working buffers allocated by the driver at the start of a print
job, RESETDEVICE must either allocate new buffers for the new physical
device structure or remove all pointers to these buffers from the old
physical device structure.
 
See Also
 
Disable, Enable, PDEVICE