DEVMODE

DEVMODE

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DEVMODE

8/28/2008

This structure contains information about a printer environment and device initialization.

Syntax


typedef struct_devicemode { 
  WCHAR dmDeviceName[CCHDEVICENAME]; 
  WORD dmSpecVersion; 
  WORD dmDriverVersion; 
  WORD dmSize; 
  WORD dmDriverExtra; 
  DWORD dmFields; 
  short dmOrientation; 
  short dmPaperSize; 
  short dmPaperLength; 
  short dmPaperWidth; 
  short dmScale; 
  short dmCopies; 
  short dmDefaultSource; 
  short dmPrintQuality; 
  short dmColor; 
  short dmDuplex; 
  short dmYResolution; 
  short dmTTOption; 
  short dmCollate; 
  BCHAR dmFormName[CCHFORMNAME]; 
  WORD dmLogPixels; 
  DWORD dmBitsPerPel; 
  DWORD dmPelsWidth; 
  DWORD dmPelsHeight; 
  DWORD dmDisplayFlags; 
  DWORD dmDisplayFrequency; 
  DWORD dmDisplayOrientation;
} DEVMODE;

Members

dmDeviceName

String that specifies the friendly name of the printer.

This string is unique among device drivers.

This name can be truncated to fit in the dmDeviceName array.

dmSpecVersion: Unsupported; set to zero.

dmDriverVersion: Unsupported; set to zero.

dmSize

WORD that specifies the size, in bytes, of the DEVMODE structure, not including any private driver-specific data that can follow the public members of the structure.

Set this member to sizeof(DEVMODE) to indicate the version of the DEVMODE structure being used.

dmDriverExtra

Contains the number of bytes of private driver-data that follow this structure.

If a device driver does not use device-specific information, set this member to zero.

dmFields

DWORD that specifies whether certain members of the DEVMODE structure have been initialized.

If a member is initialized, its corresponding bit is set, otherwise the bit is clear.

A printer driver supports only those member of the DEVMODE structure that are appropriate for the printer technology.

The following table shows the possible values.

Value	Description
DM_ORIENTATION	The dmOrientation member is initialized.
DM_PAPERSIZE	The dmPaperSize member is initialized.
DM_COPIES	The dmCopies member is initialized.
DM_PRINTQUALITY	The dmPrintQuality member is initialized.
DM_COLOR	The dmColor member is initialized.
DM_BITSPERPEL	The dmBitsPerPel member is initialized.
DM_PELSWIDTH	The dmPelsWidth member is initialized.
DM_PELSHEIGHT	The dmPelsHeight member is initialized.
DM_DISPLAYORIENTATION	The ChangeDisplaySetttingsEx function should set or obtain the current screen orientation in the dmDisplayOrientation member.
DM_DISPLAYQUERYORIENTATION	The ChangeDisplaySetttingsEx function should query the display driver to determine whether it supports screen rotation.

dmOrientation

Short integer that specifies the orientation of the paper for printer devices.

The following table shows the possible values.

Value	Description
DMORIENT_LANDSCAPE	Prints in landscape orientation.
DMORIENT_PORTRAIT	Prints in portrait orientation.

dmPaperSize

Short integer that specifies the size of the paper for printer devices.

This following table shows the possible predefined values.

Value	Description
DMPAPER_A4	A4 sheet, 210 millimeters by 297 millimeters
DMPAPER_B4	B4 sheet, 250 millimeters by 354 millimeters
DMPAPER_B5	B5 sheet, 182 millimeters by 257 millimeters
DMPAPER_LEGAL	Legal, 8 1/2 inches by 14 inches
DMPAPER_LETTER	Letter, 8 1/2 inches by 11 inches

dmPaperLength: Unsupported; set to zero.

dmPaperWidth: Unsupported; set to zero.

dmScale: Unsupported; set to zero.

dmCopies: Short integer that specifies the number of copies that you want to print, if the device supports printing multiple copies.

dmDefaultSource: Unsupported; set to zero.

dmPrintQuality

Short integer that specifies the printer resolution.

The following table shows the possible predefined device-independent values.

Value	Description
DMRES_DRAFT	Draft quality
DMRES_HIGH	High quality

dmColor

Short integer that specifies color or monochrome printing on color printers.

The following table shows the possible values.

Value	Description
DMCOLOR_COLOR	Color printing
DMCOLOR_MONOCHROME	Monochrome printing

dmDuplex: Unsupported; set to zero.

dmYResolution: Unsupported; set to zero.

dmTTOption: Unsupported; set to zero.

dmCollate: Unsupported; set to zero.

dmFormName: Unsupported; set to zero.

dmLogPixels: Unsupported; set to zero.

dmBitsPerPel

DWORD that specifies the color resolution, in bits per pixel, of the display device; for example, 4 bits for 16 colors, 8 bits for 256 colors, or 16 bits for 65,536 colors.

Display drivers use this member, but printer drivers do not.

dmPelsWidth

DWORD that specifies the width, in pixels, of the visible device surface.

Display drivers use this member, but printer drivers do not.

dmPelsHeight

DWORD that specifies the height, in pixels, of the visible device surface.

Display drivers use this member, but printer drivers do not.

dmDisplayFlags: Unsupported; set to zero.

dmDisplayFrequency: Unsupported; set to zero.

dmDisplayOrientation

DWORD that specifies the orientation of the screen.

The following table shows the possible values.

Value	Description
DMDO_0	The screen is rotated by 0 degrees.
DMDO_90	The screen is rotated by 90 degrees counterclockwise.
DMDO_180	The screen is rotated by 180 degrees.
DMDO_270	The screen is rotated by 270 degrees counterclockwise.

Remarks

The private data for a device driver follows the public portion of the DEVMODE structure.

The size of the public data can vary for different versions of the structure.

The dmSize member specifies the number of bytes of public data.

You should initialize all unsupported members with a value of zero.

Requirements

Header	windows.h
Windows Embedded CE	Windows CE 2.0 and later
Windows Mobile	Windows Mobile Version 5.0 and later

Reference

ChangeDisplaySettingsEx
CreateDC
GDI Structures