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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| user-defined
| Header File
| wingdi.h
| Unicode
| No
| Platform Notes
| FONTENUMPROC
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EnumFontFamProc
The EnumFontFamProc function is an application-defined callback function that retrieves data
describing available fonts.
int CALLBACK EnumFontFamProc(
ENUMLOGFONT FAR *lpelf,
| // pointer to logical-font data
| NEWTEXTMETRIC FAR *lpntm,
| // pointer to physical-font data
| int FontType,
| // type of font
| LPARAM lParam
| // address of application-defined data
| );
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Parameters
lpelf
Points to an ENUMLOGFONT structure that contains information about the logical attributes of the font.
This structure is locally defined.
lpntm
Points to a NEWTEXTMETRIC structure that contains information about the physical attributes of the
font, if the font is a TrueType font. If the font is not a TrueType font, this
parameter points to a TEXTMETRIC structure.
FontType
Specifies the type of the font. This parameter can be a combination of the
following values:
DEVICE_FONTTYPE
RASTER_FONTTYPE
TRUETYPE_FONTTYPE
lParam
Points to the application-defined data passed by the EnumFontFamilies function.
Return Values
The return value must be a nonzero value to continue enumeration; to stop
enumeration, it must return zero.
Remarks
An application must register this callback function by passing its address to
the EnumFontFamilies function.
The EnumFontFamProc function is a placeholder for the application-defined function name.
The AND (&) operator can be used with the RASTER_FONTTYPE, DEVICE_FONTTYPE,
and TRUETYPE_FONTTYPE constants to determine the font type. If the
RASTER_FONTTYPE bit is set, the font is a raster font. If the TRUETYPE_FONTTYPE bit is set,
the font is a TrueType font. If neither bit is set, the font is a vector font.
DEVICE_FONTTYPE is set when a device (for example, a laser printer) supports
downloading TrueType fonts or when the font is a device-resident font; it is zero
if the device is a display adapter, dot-matrix printer, or other raster device.
An application can also use DEVICE_FONTTYPE to distinguish graphics device
interface (GDI)-supplied raster fonts from device-supplied fonts. GDI can simulate
bold, italic, underline, and strikeout attributes for GDI-supplied raster
fonts, but not for device-supplied fonts.
See Also
EnumFontFamilies, EnumFontFamProc, EnumFonts, ENUMLOGFONT, NEWTEXTMETRIC, TEXTMETRIC
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