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
);

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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