Page 121 - DCAP408_WEB_PROGRAMMING

Unit 7: Character Sets, Fonts and the Keyboard

LONG tmDigitizedAspectY; Notes
char tmFirstChar;
char tmLastChar;
char tmDefaultChar;
char tmBreakChar;
BYTE tmItalic;
BYTE tmUnderlined;
BYTE tmStruckOut;
BYTE tmPitchAndFamily;
BYTE tmCharSet;
} TEXTMETRIC;

7.9.1 Members

tmHeight
States the height (ascent descent) of characters.

tmAscent
States the ascent (units above the base line) of characters.
tmDescent
States the descent (units below the base line) of characters.
tmInternalLeading

States the amount of leading (space) inside the bounds set by the tmHeight member. Accent
marks and other diacritical characters may happen in this area. The designer may set this member
to zero.
tmExternalLeading
States the amount of extra leading (space) that the application adds among rows. Since this area
is outside the font, it includes no marks and is not altered by text output calls in either OPAQUE
or TRANSPARENT mode. The designer may set this member to zero.

tmAveCharWidth
States the average width of characters in the font (generally defined as the width of the letter x).
This value does not comprise the overhang needed for bold or italic characters.

tmMaxCharWidth
States the width of the widest character in the font.
tmWeight
Specifies the weight of the font.
tmOverhang

Specifies the extra width per string that may be added to some synthesized fonts. When
synthesizing some attributes, such as bold or italic, graphics device interface (GDI) or a device
may have to add width to a string on both a per-character and per-string basis.

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