The ABC structure contains the width of a character in a TrueType font.
typedef struct _ABC { // abc
int abcA;
UINT abcB;
int abcC;
} ABC;
The total width of a character is the summation of the "A," "B," and "C" spaces. Either the "A" or the "C" space can be negative to indicate underhangs or overhangs.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in wingdi.h.
Fonts and Text Overview, Font and Text Structures, GetCharABCWidths