| clock_t |
The clock_t type, defined in TIME.H, stores time values. It is used by the clock function. |
| _complex |
The _complex structure, defined in MATH.H, stores the real and imaginary parts of complex numbers. It is used by the _cabs function. |
| _diskfree_t |
The _diskfree_t structure, defined in DOS.H, stores disk information used by the _dos_getdiskfree routine. |
| _diskinfo_t |
The _diskinfo_t structure, defined in BIOS.H, records information about disk drives returned by the _bios_disk routine. |
| div_t, ldiv_t |
The div_t and ldiv_t structures, defined in STDLIB.H, store the values returned by the div and ldiv functions, respectively. |
| _dosdate_t |
The _dosdate_t structure, defined in DOS.H, records the current system date used in the _dos_getdate and _dos_setdate routines. |
| _dostime_t |
The _dostime_t structure, defined in DOS.H, records the current system time used in the _dos_gettime and _dos_settime routines. |
| _DOSERROR |
The _DOSERROR structure, defined in DOS.H, stores values returned by DOS system call 59H (available with DOS versions 3.0 and later). |
| _exception |
The _exception structure, defined in MATH.H, stores error information for math routines. It is used by the _matherr routine. |
| FILE |
The FILE structure, defined in STDIO.H, is the structure used in all stream input and output operations. The fields of the FILE structure store information about the current state of the stream. |
| _find_t |
The _find_t structure, defined in DOS.H, stores file-attribute information returned by the _dos_findfirst and _dos_findnext routines. |
| fpos_t |
The fgetpos and fsetpos functions use the fpos_t object type, defined in STDIO.H, to record all the information necessary to uniquely specify every position within the file. |
| jmp_buf |
The jmp_buf type, defined in SETJMP.H, is an array type rather than a structure type. A buffer of this type is used by the setjmp and longjmp routines to save and restore the program environment. |
| lconv |
The lconv type, defined in LOCALE.H, is a structure containing formatting rules for numeric values in different countries. |
| _onexit_t |
The _onexit routine is declared as an _onexit_t pointer type, which is defined in STDLIB.H. |
| ptrdiff_t |
The ptrdiff_t type is used for the signed integral result of the subtraction of two pointers. |
| _REGS |
The _REGS union, defined in DOS.H, stores byte and word register values to be passed to and returned from calls to the DOS interface functions. |
| sig_atomic_t |
The sig_atomic_t type, defined in SIGNAL.H, is the integral type of an object that can be modified as an atomic entity, even in the presence of asynchronous interrupts. It is used in conjunction with the signal routine. |
| size_t |
The size_t type, defined in STDDEF.H and several other include files, is the unsigned integral result of the sizeof operator. |
| _SREGS |
The _SREGS structure, defined in DOS.H, stores the values of the ES, CS, SS, and DS registers. This structure is used by the DOS interface functions that require segment register values (_int86x, _intdosx, and _segread). |
| _stat |
The _stat structure, defined in SYS\STAT.H, contains file-status information returned by the _stat and _fstat routines. |
| time_t |
The time_t type, defined in TIME.H, represents time values in the mktime and time routines. |
| _timeb |
The _timeb structure, defined in SYS\TIMEB.H, is used by the _ftime routine to store the current system time. |
| tm |
The tm structure, defined in TIME.H, is used by the asctime, gmtime, and localtime functions to store and retrieve time information. |
| _utimbuf |
The _utimbuf structure, defined in SYS\UTIME.H, stores file access and modification times used by the _utime function to change file-modification dates. |
| va_list |
The va_list array type, defined in STDARG.H, is used to hold information needed by the va_arg macro and the va_end routine. The called function declares a variable of type va_list, which can be passed as an argument to another function. |
| _vmhnd_t |
The _vmhnd_t type, defined in VMEMORY.H, represents the handles to blocks of virtual memory. Handles of this type are returned by _vmalloc and used by the virtual memory routines. |
| wchar_t |
The wchar_t type, defined in STDDEF.H and STDLIB.H, is the internal type of a wide character. It is required by the ANSI standard for the C language and is useful when writing portable programs for international markets. |
| _wopeninfo |
The _wopeninfo type is a structure containing information needed to open a new QuickWin window. It is defined in IO.H. |
| _wsizeinfo |
The _wsizeinfo type is a structure containing information needed to initialize the size of a new QuickWin window, to examine the size of an existing QuickWin window, or to resize an existing QuickWin window. It is defined in IO.H. |