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DEVMODE info  Overview  Group

The DEVMODE data structure contains information about the device initialization and environment of a printer.

typedef struct _devicemode {    // dvmd 

    BCHAR  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; 

#if(WINVER >= 0x0400) 

    DWORD  dmICMMethod;         // Windows 95 only 

    DWORD  dmICMIntent;         // Windows 95 only 

    DWORD  dmMediaType;         // Windows 95 only 

    DWORD  dmDitherType;        // Windows 95 only 

    DWORD  dmReserved1;         // Windows 95 only 

    DWORD  dmReserved2;         // Windows 95 only 

#endif /* WINVER >= 0x0400 */ 

} DEVMODE; 

 

Members

dmDeviceName
Specifies the the “friendly” name of the printer; for example, “PCL/HP LaserJet” in the case of PCL/HP LaserJet®. This string is unique among device drivers. Note that this name may be truncated to fit in the dmDeviceName array.
dmSpecVersion
Specifies the version number of the initialization data specification on which the structure is based.
dmDriverVersion
Specifies the printer driver version number assigned by the printer driver developer.
dmSize
Specifies the size, in bytes, of the DEVMODE structure, not including any private driver-specific data that might follow the structure’s public members. You can use this member to determine the number of bytes of public data regardless of 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
A set of bit flags that specify whether certain members of the DEVMODE structure have been initialized. If a field is initialized, its corresponding bit flag is set, otherwise the bit flag is clear. A printer driver supports only those DEVMODE structure members that are appropriate for the printer technology.

The following bit flags are defined, and are listed here with the corresponding structure members:

Value

Structure Member

DM_ORIENTATION

dmOrientation

DM_PAPERSIZE

dmPaperSize

DM_PAPERLENGTH

dmPaperLength

DM_PAPERWIDTH

dmPaperWidth

DM_SCALE

dmScale

DM_COPIES

dmCopies

DM_DEFAULTSOURCE

dmDefaultSource

DM_PRINTQUALITY

dmPrintQuality

DM_COLOR

dmColor

DM_DUPLEX

dmDuplex

DM_YRESOLUTION

dmYResolution

DM_TTOPTION

dmTTOption

DM_COLLATE

dmCollate

DM_FORMNAME

dmFormName

DM_LOGPIXELS

dmLogPixels

DM_BITSPERPEL

dmBitsPerPel

DM_PELSWIDTH

dmPelsWidth

DM_PELSHEIGHT

dmPelsHeight

DM_DISPLAYFLAGS

dmDisplayFlags

DM_DISPLAYFREQUENCY

dmDisplayFrequency

DM_ICMMETHOD

Windows 95 only: dmICMMethod

DM_ICMINTENT

Windows 95 only: dmICMIntent

DM_MEDIATYPE

Windows 95 only: dmMediaType

DM_DITHERTYPE

Windows 95 only: dmDitherType

dmOrientation
Selects the orientation of the paper. This member can be either DMORIENT_PORTRAIT (1) or DMORIENT_LANDSCAPE (2).
dmPaperSize
Selects the size of the paper to print on. This member can be set to zero if the length and width of the paper are both set by the dmPaperLength and dmPaperWidth members. Otherwise, the dmPaperSize member can be set to one of the following predefined values:

Value

Meaning

DMPAPER_LETTER

Letter, 8 1/2- by 11-inches

DMPAPER_LEGAL

Legal, 8 1/2- by 14-inches

DMPAPER_A4

A4 Sheet, 210- by 297-millimeters

DMPAPER_CSHEET

C Sheet, 17- by 22-inches

DMPAPER_DSHEET

D Sheet, 22- by 34-inches

DMPAPER_ESHEET

E Sheet, 34- by 44-inches

DMPAPER_LETTERSMALL

Letter Small, 8 1/2- by 11-inches

DMPAPER_TABLOID

Tabloid, 11- by 17-inches

DMPAPER_LEDGER

Ledger, 17- by 11-inches

DMPAPER_STATEMENT

Statement, 5 1/2- by 8 1/2-inches

DMPAPER_EXECUTIVE

Executive, 7 1/4- by 10 1/2-inches

DMPAPER_A3

A3 sheet, 297- by 420-millimeters

DMPAPER_A4SMALL

A4 small sheet, 210- by 297-millimeters

DMPAPER_A5

A5 sheet, 148- by 210-millimeters

DMPAPER_B4

B4 sheet, 250- by 354-millimeters

DMPAPER_B5

B5 sheet, 182- by 257-millimeter paper

DMPAPER_FOLIO

Folio, 8 1/2- by 13-inch paper

DMPAPER_QUARTO

Quarto, 215- by 275-millimeter paper

DMPAPER_10X14

10- by 14-inch sheet

DMPAPER_11X17

11- by 17-inch sheet

DMPAPER_NOTE

Note, 8 1/2- by 11-inches

DMPAPER_ENV_9

#9 Envelope, 3 7/8- by 8 7/8-inches

DMPAPER_ENV_10

#10 Envelope, 4 1/8- by 9 1/2-inches

DMPAPER_ENV_11

#11 Envelope, 4 1/2- by 10 3/8-inches

DMPAPER_ENV_12

#12 Envelope, 4 3/4- by 11-inches

DMPAPER_ENV_14

#14 Envelope, 5- by 11 1/2-inches

DMPAPER_ENV_DL

DL Envelope, 110- by 220-millimeters

DMPAPER_ENV_C5

C5 Envelope, 162- by 229-millimeters

DMPAPER_ENV_C3

C3 Envelope, 324- by 458-millimeters

DMPAPER_ENV_C4

C4 Envelope, 229- by 324-millimeters

DMPAPER_ENV_C6

C6 Envelope, 114- by 162-millimeters

DMPAPER_ENV_C65

C65 Envelope, 114- by 229-millimeters

DMPAPER_ENV_B4

B4 Envelope, 250- by 353-millimeters

DMPAPER_ENV_B5

B5 Envelope, 176- by 250-millimeters

DMPAPER_ENV_B6

B6 Envelope, 176- by 125-millimeters

DMPAPER_ENV_ITALY

Italy Envelope, 110- by 230-millimeters

DMPAPER_ENV_MONARCH

Monarch Envelope, 3 7/8- by 7 1/2-inches

DMPAPER_ENV_PERSONAL

6 3/4 Envelope, 3 5/8- by 6 1/2-inches

DMPAPER_FANFOLD_US

US Std Fanfold, 14 7/8- by 11-inches

DMPAPER_FANFOLD_STD_GERMAN

German Std Fanfold, 8 1/2- by 12-inches

DMPAPER_FANFOLD_LGL_GERMAN

German Legal Fanfold, 8 1/2- by 13-inches

dmPaperLength
Overrides the length of the paper specified by the dmPaperSize member, either for custom paper sizes or for devices such as dot-matrix printers, which can print on a page of arbitrary length. These values, along with all other values in this structure that specify a physical length, are in tenths of a millimeter.
dmPaperWidth
Overrides the width of the paper specified by the dmPaperSize member.
dmScale
Specifies the factor by which the printed output is to be scaled. The apparent page size is scaled from the physical page size by a factor of dmScale/100. For example, a letter-sized page with a dmScale value of 50 would contain as much data as a page of 17- by 22-inches because the output text and graphics would be half their original height and width.
dmCopies
Selects the number of copies printed if the device supports multiple-page copies.
dmDefaultSource
Reserved; must be zero.
dmPrintQuality
Specifies the printer resolution. There are four predefined device-independent values:

DMRES_HIGH
DMRES_MEDIUM
DMRES_LOW
DMRES_DRAFT

If a positive value is given, it specifies the number of dots per inch (DPI) and is therefore device dependent.

dmColor
Switches between color and monochrome on color printers. Following are the possible values:

DMCOLOR_COLOR
DMCOLOR_MONOCHROME

dmDuplex
Selects duplex or double-sided printing for printers capable of duplex printing. Following are the possible values:

DMDUP_SIMPLEX
DMDUP_HORIZONTAL
DMDUP_VERTICAL

dmYResolution
Specifies the y-resolution, in dots per inch, of the printer. If the printer initializes this member, the dmPrintQuality member specifies the x-resolution, in dots per inch, of the printer.
dmTTOption
Specifies how TrueType® fonts should be printed. This member can be one of the following values:

Value

Meaning

DMTT_BITMAP

Prints TrueType fonts as graphics. This is the default action for dot-matrix printers.

DMTT_DOWNLOAD

Downloads TrueType fonts as soft fonts. This is the default action for Hewlett-Packard printers that use Printer Control Language (PCL).

DMTT_SUBDEV

Substitute device fonts for TrueType fonts. This is the default action for PostScript® printers.

dmUnusedPadding
Used to align the structure to a DWORD boundary. This should not be used or referenced. Its name and usage is reserved, and can change in future releases.
dmCollate
Specifies whether collation should be used when printing multiple copies. (This member is ignored unless the printer driver indicates support for collation by setting the dmFields member to DM_COLLATE.) This member can be be one of the following values:

Value

Meaning

DMCOLLATE_TRUE

Collate when printing multiple copies.

DMCOLLATE_FALSE

Do not collate when printing multiple copies.

Using DMCOLLATE_TRUE provides faster, more efficient output for collation, since the data is sent to the device driver just once, no matter how many copies are required. The printer is told to simply print the page again.

dmFormName
Windows NT: Specifies the name of the form to use; for example, “Letter” or “Legal”. A complete set of names can be retrieved by using the EnumForms function.

Windows 95: Printer drivers do not use this member.

dmLogPixels
Specifies the number of pixels per logical inch. Printer drivers do not use this member.
dmBitsPerPel
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 65536 colors). Display drivers use this member, for example, in the ChangeDisplaySettings function. Printer drivers do not use this member.
dmPelsWidth
Specifies the width, in pixels, of the visible device surface. Display drivers use this member, for example, in the ChangeDisplaySettings function. Printer drivers do not use this member.
dmPelsHeight
Specifies the height, in pixels, of the visible device surface. Display drivers use this member, for example, in the ChangeDisplaySettings function. Printer drivers do not use this member.
dmDisplayFlags
Specifies the device’s display mode. This member can be one of the following values:

Value

Meaning

DM_GRAYSCALE

Specifies that the display is a noncolor device. If this flag is not set, color is assumed.

DM_INTERLACED

Specifies that the display mode is interlaced. If the flag is not set, noninterlaced is assumed.

Display drivers use this member, for example, in the ChangeDisplaySettings function. Printer drivers do not use this member.

dmDisplayFrequency
Specifies the frequency, in hertz (cycles per second), of the display device in a particular mode. This value is also known as the display device’s vertical refresh rate. Display drivers use this member. It is used, for example, in the ChangeDisplaySettings function. Printer drivers do not use this member.

When you call the EnumDisplaySettings function, the dmDisplayFrequency member may return with the value 0 or 1. These values represent the display hardware’s default refresh rate. This default rate is typically set by switches on a display card or computer motherboard, or by a configuration program that does not use Win32 display functions such as ChangeDisplaySettings.

dmICMMethod
Windows 95:

Specifies how ICM is handled. For a non-ICM application, this member determines if ICM is enabled or disabled. For ICM applications, Windows examines this member to determine how to handle ICM support. This member can be one of the following predefined values, or a driver-defined value greater than the value of DMICMMETHOD_USER:

Value

Meaning

DMICMMETHOD_NONE

Windows 95 only: Specifies that ICM is disabled.

DMICMMETHOD_SYSTEM

Windows 95 only: Specifies that ICM is handled by Windows.

DMICMMETHOD_DRIVER

Windows 95 only: Specifies that ICM is handled by the device driver.

DMICMMETHOD_DEVICE

Windows 95 only: Specifies that ICM is handled by the destination device.

The printer driver must provide a user interface for setting this member. Most printer drivers support only the DMICMMETHOD_SYSTEM or DMICMMETHOD_NONE value. Drivers for PostScript printers support all values.

Windows NT:
This member is not supported on Windows NT.
dmICMIntent
Windows 95:

Specifies which of the three possible color matching methods, or intents, should be used by default. This member is primarily for non-ICM applications. ICM applications can establish intents by using the ICM functions. This member can be one of the following predefined values, or a driver defined value greater than the value of DMICM_USER:

Value

Meaning

DMICM_SATURATE

Windows 95 only: Color matching should optimize for color saturation. This value is the most appropriate choice for business graphs when dithering is not desired.

DMICM_CONTRAST

Windows 95 only: Color matching should optimize for color contrast. This value is the most appropriate choice for scanned or photographic images when dithering is desired.

DMICM_COLORMETRIC

Windows 95 only: Color matching should optimize to match the exact color requested. This value is most appropriate for use with business logos or other images when an exact color match is desired.

Windows NT:
This member is not supported on Windows NT.
dmMediaType
Windows 95:

Specifies the type of media being printed on. The member can be one of the following predefined values, or a driver-defined value greater than the value of DMMEDIA_USER:

Value

Meaning

DMMEDIA_STANDARD

Windows 95 only: Plain paper.

DMMEDIA_GLOSSY

Windows 95 only: Glossy paper.

DMMEDIA_TRANSPARENCY

Windows 95 only: Transparent film.

Windows NT:
This member is not supported on Windows NT.
dmDitherType
Windows 95:

Specifies how dithering is to be done. The member can be one of the following predefined values, or a driver-defined value greater than the value of DMDITHER_USER:

Value

Meaning

DMDITHER_NONE

Windows 95 only: No dithering.

DMDITHER_COARSE

Windows 95 only: Dithering with a coarse brush.

DMDITHER_FINE

Windows 95 only: Dithering with a fine brush.

DMDITHER_LINEART

Windows 95 only: Line art dithering, a special dithering method that produces well defined borders between black, white, and gray scalings. It is not suitable for images that include continuous graduations in intensisty and hue such as scanned photographs.

DMDITHER_GRAYSCALE

Windows 95 only: Device does grayscaling.

Windows NT:
This member is not supported on Windows NT.
dmReserved1
Windows 95: Not used; must be zero.

Windows NT: This member is not supported on Windows NT.

dmReserved2
Windows 95: Not used; must be zero.

Windows NT: This member is not supported on Windows NT.

Remarks

A device driver's private data 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, and the dmDriverExtra member specifies the number of bytes of private data.

See Also

AdvancedDocumentProperties, CreateDC, CreateIC, DeviceCapabilities, DocumentProperties, OpenPrinter 

See also:


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