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Windows Data Types

2005-08-06 10:30 435 查看

The data types supported by Microsoft® Windows® are used to define function return values, function and message parameters, and structure members. They define the size and meaning of these elements. For more information about the underlying C/C++ data types, see Data Type Ranges.

The following table contains the following types: character, integer, Boolean, pointer, and handle. The character, integer, and Boolean types are common to most C compilers. Most of the pointer-type names begin with a prefix of P or LP. Handles refer to a resource that has been loaded into memory.

For more information about handling 64-bit integers, see Large Integers.

TermDescription
ATOMAtom. For more information, see Atoms.
This type is declared in WinDef.h as follows:

typedef WORD ATOM;
BOOLBoolean variable (should be TRUE or FALSE).
This type is declared in WinDef.h as follows:

typedef int BOOL;
BOOLEANBoolean variable (should be TRUE or FALSE).
This type is declared in WinNT.h as follows:

typedef BYTE BOOLEAN;
BYTEByte (8 bits).
This type is declared in WinDef.h as follows:

typedef unsigned char BYTE;
CALLBACKCalling convention for callback functions.
This type is declared in WinDef.h as follows:

#define CALLBACK __stdcall
CHAR8-bit Windows (ANSI) character. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef char CHAR;
COLORREFRed, green, blue (RGB) color value (32 bits). See COLORREF for information on this type.
This type is declared in WinDef.h as follows:

typedef DWORD COLORREF;
CONSTVariable whose value is to remain constant during execution.
This type is declared in WinDef.h as follows:

#define CONST const
DWORD32-bit unsigned integer.
This type is declared in WinDef.h as follows:

typedef unsigned long DWORD;
DWORDLONG64-bit unsigned integer.
This type is declared in WinNT.h as follows:

typedef ULONGLONG DWORDLONG;
DWORD_PTRUnsigned long type for pointer precision. Use when casting a pointer to a long type to perform pointer arithmetic. (Also commonly used for general 32-bit parameters that have been extended to 64 bits in 64-bit Windows. )
This type is declared in BaseTsd.h as follows:

typedef ULONG_PTR DWORD_PTR;
DWORD3232-bit unsigned integer.
This type is declared in BaseTsd.h as follows:

typedef unsigned int DWORD32;
DWORD6464-bit unsigned integer.
This type is declared in BaseTsd.h as follows:

typedef unsigned __int64 DWORD64;
FLOATFloating-point variable.
This type is declared in WinDef.h as follows:

typedef float FLOAT;
HACCELHandle to an accelerator table.
This type is declared in WinDef.h as follows:

typedef HANDLE HACCEL;
HALF_PTRHalf the size of a pointer. Use within a structure that contains a pointer and two small fields.
This type is declared in Basetsd.h as follows:

#ifdef _WIN64
typedef int HALF_PTR;
#else
typedef short HALF_PTR;
#endif
HANDLEHandle to an object.
This type is declared in WinNT.h as follows:

typedef PVOID HANDLE;
HBITMAPHandle to a bitmap.
This type is declared in WinDef.h as follows:

typedef HANDLE HBITMAP;
HBRUSHHandle to a brush.
This type is declared in WinDef.h as follows:

typedef HANDLE HBRUSH;
HCOLORSPACEHandle to a color space.
This type is declared in WinDef.h as follows:

#if(WINVER >= 0x0400)
typedef HANDLE HCOLORSPACE;
#endif
HCONVHandle to a dynamic data exchange (DDE) conversation.
This type is declared in Ddeml.h as follows:

typedef HANDLE HCONV;
HCONVLISTHandle to a DDE conversation list.
This type is declared in Ddeml.h as follows:

typedef HANDLE HCONVLIST;
HCURSORHandle to a cursor.
This type is declared in WinDef.h as follows:

typedef HICON HCURSOR;
HDCHandle to a device context (DC).
This type is declared in WinDef.h as follows:

typedef HANDLE HDC;
HDDEDATAHandle to DDE data.
This type is declared in Ddeml.h as follows:

typedef HANDLE HDDEDATA;
HDESKHandle to a desktop.
This type is declared in WinDef.h as follows:

typedef HANDLE HDESK;
HDROPHandle to an internal drop structure.
This type is declared in ShellApi.h as follows:

typedef HANDLE HDROP;
HDWPHandle to a deferred window position structure.
This type is declared in WinUser.h as follows:

typedef HANDLE HDWP;
HENHMETAFILEHandle to an enhanced metafile.
This type is declared in WinDef.h as follows:

typedef HANDLE HENHMETAFILE;
HFILEHandle to a file opened by OpenFile, not CreateFile.
This type is declared in WinDef.h as follows:

typedef int HFILE;
HFONTHandle to a font.
This type is declared in WinDef.h as follows:

typedef HANDLE HFONT;
HGDIOBJHandle to a GDI object.
This type is declared in WinDef.h as follows:

typedef HANDLE HGDIOBJ;
HGLOBALHandle to a global memory block.
This type is declared in WinDef.h as follows:

typedef HANDLE HGLOBAL;
HHOOKHandle to a hook.
This type is declared in WinDef.h as follows:

typedef HANDLE HHOOK;
HICONHandle to an icon.
This type is declared in WinDef.h as follows:

typedef HANDLE HICON;
HINSTANCEHandle to an instance.
This type is declared in WinDef.h as follows:

typedef HANDLE HINSTANCE;
HKEYHandle to a registry key.
This type is declared in WinDef.h as follows:

typedef HANDLE HKEY;
HKLInput locale identifier.
This type is declared in WinDef.h as follows:

typedef HANDLE HKL;
HLOCALHandle to a local memory block.
This type is declared in WinDef.h as follows:

typedef HANDLE HLOCAL;
HMENUHandle to a menu.
This type is declared in WinDef.h as follows:

typedef HANDLE HMENU;
HMETAFILEHandle to a metafile.
This type is declared in WinDef.h as follows:

typedef HANDLE HMETAFILE;
HMODULEHandle to a module. The value is the base address of the module.
This type is declared in WinDef.h as follows:

typedef HINSTANCE HMODULE;
HMONITORHandle to a display monitor.
This type is declared in WinDef.h as follows:

if(WINVER >= 0x0500) typedef HANDLE HMONITOR;
HPALETTEHandle to a palette.
This type is declared in WinDef.h as follows:

typedef HANDLE HPALETTE;
HPENHandle to a pen.
This type is declared in WinDef.h as follows:

typedef HANDLE HPEN;
HRESULTReturn code used by interfaces. It is zero upon success and nonzero to represent an error code or status information.
This type is declared in WinNT.h as follows:

typedef LONG HRESULT;
HRGNHandle to a region.
This type is declared in WinDef.h as follows:

typedef HANDLE HRGN;
HRSRCHandle to a resource.
This type is declared in WinDef.h as follows:

typedef HANDLE HRSRC;
HSZHandle to a DDE string.
This type is declared in Ddeml.h as follows:

typedef HANDLE HSZ;
HWINSTAHandle to a window station.
This type is declared in WinDef.h as follows:

typedef HANDLE WINSTA;
HWNDHandle to a window.
This type is declared in WinDef.h as follows:

typedef HANDLE HWND;
INT32-bit signed integer.
This type is declared in WinDef.h as follows:

typedef int INT;
INT_PTRSigned integer type for pointer precision. Use when casting a pointer to an integer to perform pointer arithmetic.
This type is declared in BaseTsd.h as follows:

#if defined(_WIN64)
typedef __int64 INT_PTR;
#else
typedef int INT_PTR;
#endif
INT3232-bit signed integer.
This type is declared in BaseTsd.h as follows:

typedef signed int INT32;
INT6464-bit signed integer.
This type is declared in BaseTsd.h as follows:

typedef signed __int64 INT64;
LANGIDLanguage identifier. For more information, see Locales.
This type is declared in WinNT.h as follows:

typedef WORD LANGID;
LCIDLocale identifier. For more information, see Locales.
This type is declared in WinNT.h as follows:

typedef DWORD LCID;
LCTYPELocale information type. For a list, see Locale and Language Information.
This type is declared in WinNls.h as follows:

typedef DWORD LCTYPE;
LGRPIDLanguage group identifier. For a list, see EnumLanguageGroupLocales.
This type is declared in WinNls.h as follows:

typedef DWORD LGRPID;
LONG32-bit signed integer.
This type is declared in WinNT.h as follows:

typedef long LONG;
LONGLONG64-bit signed integer.
This type is declared in WinNT.h as follows:

#if !defined(_M_IX86)
typedef __int64 LONGLONG;
#else
typedef double LONGLONG;
#endif
LONG_PTRSigned long type for pointer precision. Use when casting a pointer to a long to perform pointer arithmetic.
This type is declared in BaseTsd.h as follows:

#if defined(_WIN64)
typedef __int64 LONG_PTR;
#else
typedef long LONG_PTR;
#endif
LONG3232-bit signed integer.
This type is declared in BaseTsd.h as follows:

typedef signed int LONG32;
LONG6464-bit signed integer.
This type is declared in BaseTsd.h as follows:

typedef __int64 LONG64;
LPARAMMessage parameter.
This type is declared in WinDef.h as follows:

typedef LONG_PTR LPARAM;
LPBOOLPointer to a BOOL.
This type is declared in WinDef.h as follows:

typedef BOOL far *LPBOOL;
LPBYTEPointer to a BYTE.
This type is declared in WinDef.h as follows:

typedef BYTE far *LPBYTE;
LPCOLORREFPointer to a COLORREF value.
This type is declared in WinDef.h as follows:

typedef DWORD *LPCOLORREF;
LPCSTRPointer to a constant null-terminated string of 8-bit Windows (ANSI) characters. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef __nullterminated CONST CHAR *LPCSTR;
LPCTSTRAn LPCWSTR if UNICODE is defined, an LPCSTR otherwise.
This type is declared in WinNT.h as follows:

#ifdef UNICODE
typedef LPCWSTR LPCTSTR;
#else
typedef LPCSTR LPCTSTR;
#endif
LPCVOIDPointer to a constant of any type.
This type is declared in WinDef.h as follows:

typedef CONST void *LPCVOID;
LPCWSTRPointer to a constant null-terminated string of 16-bit Unicode characters. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef CONST WCHAR *LPCWSTR;
LPDWORDPointer to a DWORD.
This type is declared in WinDef.h as follows:

typedef DWORD *LPDWORD;
LPHANDLEPointer to a HANDLE.
This type is declared in WinDef.h as follows:

typedef HANDLE *LPHANDLE;
LPINTPointer to an INT.
This type is declared in WinDef.h as follows:

typedef int *LPINT;
LPLONGPointer to a LONG.
This type is declared in WinDef.h as follows:

typedef long *LPLONG;
LPSTRPointer to a null-terminated string of 8-bit Windows (ANSI) characters. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef CHAR *LPSTR;
LPTSTRAn LPWSTR if UNICODE is defined, an LPSTR otherwise.
This type is declared in WinNT.h as follows:

#ifdef UNICODE
typedef LPWSTR LPTSTR;
#else
typedef LPSTR LPTSTR;
#endif
LPVOIDPointer to any type.
This type is declared in WinDef.h as follows:

typedef void *LPVOID;
LPWORDPointer to a WORD.
This type is declared in WinDef.h as follows:

typedef WORD *LPWORD;
LPWSTRPointer to a null-terminated string of 16-bit Unicode characters. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef WCHAR *LPWSTR;
LRESULTSigned result of message processing.
This type is declared in WinDef.h as follows:

typedef LONG_PTR LRESULT;
PBOOLPointer to a BOOL.
This type is declared in WinDef.h as follows:

typedef BOOL *PBOOL;
PBOOLEANPointer to a BOOL.
This type is declared in WinNT.h as follows:

typedef BOOLEAN *PBOOLEAN;
PBYTEPointer to a BYTE.
This type is declared in WinDef.h as follows:

typedef BYTE *PBYTE;
PCHARPointer to a CHAR.
This type is declared in WinNT.h as follows:

typedef CHAR *PCHAR;
PCSTRPointer to a constant null-terminated string of 8-bit Windows (ANSI) characters. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef CONST CHAR *PCSTR;
PCTSTRA PCWSTR if UNICODE is defined, a PCSTR otherwise.
This type is declared in WinNT.h as follows:

#ifdef UNICODE
typedef LPCWSTR PCTSTR;
#else
typedef LPCSTR PCTSTR;
#endif
PCWSTRPointer to a constant null-terminated string of 16-bit Unicode characters. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef CONST WCHAR *PCWSTR;
PDWORDPointer to a DWORD.
This type is declared in WinDef.h as follows:

typedef DWORD *PDWORD;
PDWORDLONGPointer to a DWORDLONG.
This type is declared in WinNT.h as follows:

typedef DWORDLONG *PDWORDLONG;
PDWORD_PTRPointer to a DWORD_PTR.
This type is declared in BaseTsd.h as follows:

typedef DWORD_PTR *PDWORD_PTR;
PDWORD32Pointer to a DWORD32.
This type is declared in BaseTsd.h as follows:

typedef DWORD32 *PDWORD32;
PDWORD64Pointer to a DWORD64.
This type is declared in BaseTsd.h as follows:

typedef DWORD64 *PDWORD64;
PFLOATPointer to a FLOAT.
This type is declared in WinDef.h as follows:

typedef FLOAT *PFLOAT;
PHALF_PTRPointer to a HALF_PTR.
This type is declared in Basetsd.h as follows:

#ifdef _WIN64
typedef HALF_PTR *PHALF_PTR;
#else
typedef HALF_PTR *PHALF_PTR;
#endif
PHANDLEPointer to a HANDLE.
This type is declared in WinNT.h as follows:

typedef HANDLE *PHANDLE;
PHKEYPointer to an HKEY.
This type is declared in WinDef.h as follows:

typedef HKEY *PHKEY;
PINTPointer to an INT.
This type is declared in WinDef.h as follows:

typedef int *PINT;
PINT_PTRPointer to an INT_PTR.
This type is declared in BaseTsd.h as follows:

typedef INT_PTR *PINT_PTR;
PINT32Pointer to an INT32.
This type is declared in BaseTsd.h as follows:

typedef INT32 *PINT32;
PINT64Pointer to an INT64.
This type is declared in BaseTsd.h as follows:

typedef INT64 *PINT64;
PLCIDPointer to an LCID.
This type is declared in WinNT.h as follows:

typedef PDWORD PLCID;
PLONGPointer to a LONG.
This type is declared in WinNT.h as follows:

typedef LONG *PLONG;
PLONGLONGPointer to a LONGLONG.
This type is declared in WinNT.h as follows:

typedef LONGLONG *PLONGLONG;
PLONG_PTRPointer to a LONG_PTR.
This type is declared in BaseTsd.h as follows:

typedef LONG_PTR *PLONG_PTR;
PLONG32Pointer to a LONG32.
This type is declared in BaseTsd.h as follows:

typedef LONG32 *PLONG32;
PLONG64Pointer to a LONG64.
This type is declared in BaseTsd.h as follows:

typedef LONG64 *PLONG64;
POINTER_3232-bit pointer. On a 32-bit system, this is a native pointer. On a 64-bit system, this is a truncated 64-bit pointer.
This type is declared in BaseTsd.h as follows:

#if defined(_WIN64)
#define POINTER_32 __ptr32
#else
#define POINTER32
#endif
POINTER_6464-bit pointer. On a 64-bit system, this is a native pointer. On a 32-bit system, this is a sign-extended 32-bit pointer.
Note that it is not safe to assume the state of the high pointer bit.

This type is declared in BaseTsd.h as follows:

#define POINTER_64 __ptr64
PSHORTPointer to a SHORT.
This type is declared in WinNT.h as follows:

typedef SHORT *PSHORT;
PSIZE_TPointer to a SIZE_T.
This type is declared in BaseTsd.h as follows:

typedef SIZE_T *PSIZE_T;
PSSIZE_TPointer to a SSIZE_T.
This type is declared in BaseTsd.h as follows:

typedef SSIZE_T *PSSIZE_T;
PSTRPointer to a null-terminated string of 8-bit Windows (ANSI) characters. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef CHAR *PSTR;
PTBYTEPointer to a TBYTE.
This type is declared in WinNT.h as follows:

typedef TBYTE *PTBYTE;
PTCHARPointer to a TCHAR.
This type is declared in WinNT.h as follows:

typedef TCHAR *PTCHAR;
PTSTRA PWSTR if UNICODE is defined, a PSTR otherwise.
This type is declared in WinNT.h as follows:

#ifdef UNICODE
typedef LPWSTR PTSTR;
#else typedef LPSTR PTSTR;
#endif
PUCHARPointer to a UCHAR.
This type is declared in WinDef.h as follows:

typedef UCHAR *PUCHAR;
PUHALF_PTRPointer to a UHALF_PTR.
This type is declared in Basetsd.h as follows:

#ifdef _WIN64
typedef UHALF_PTR *PUHALF_PTR;
#else
typedef UHALF_PTR *PUHALF_PTR;
#endif
PUINTPointer to a UINT.
This type is declared in WinDef.h as follows:

typedef UINT *PUINT;
PUINT_PTRPointer to a UINT_PTR.
This type is declared in BaseTsd.h as follows:

typedef UINT_PTR *PUINT_PTR;
PUINT32Pointer to a UINT32.
This type is declared in BaseTsd.h as follows:

typedef UINT32 *PUINT32;
PUINT64Pointer to a UINT64.
This type is declared in BaseTsd.h as follows:

typedef UINT64 *PUINT64;
PULONGPointer to a ULONG.
This type is declared in WinDef.h as follows:

typedef ULONG *PULONG;
PULONGLONGPointer to a ULONGLONG.
This type is declared in WinDef.h as follows:

typedef ULONGLONG *PULONGLONG;
PULONG_PTRPointer to a ULONG_PTR.
This type is declared in BaseTsd.h as follows:

typedef ULONG_PTR *PULONG_PTR;
PULONG32Pointer to a ULONG32.
This type is declared in BaseTsd.h as follows:

typedef ULONG32 *PULONG32;
PULONG64Pointer to a ULONG64.
This type is declared in BaseTsd.h as follows:

typedef ULONG64 *PULONG64;
PUSHORTPointer to a USHORT.
This type is declared in WinDef.h as follows:

typedef USHORT *PUSHORT;
PVOIDPointer to any type.
This type is declared in WinNT.h as follows:

typedef void *PVOID;
PWCHARPointer to a WCHAR.
This type is declared in WinNT.h as follows:

typedef WCHAR *PWCHAR;
PWORDPointer to a WORD.
This type is declared in WinDef.h as follows:

typedef WORD *PWORD;
PWSTRPointer to a null- terminated string of 16-bit Unicode characters. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef WCHAR *PWSTR;
SC_HANDLEHandle to a service control manager database. For more information, see SCM Handles.
This type is declared in WinSvc.h as follows:

typedef HANDLE SC_HANDLE;
SC_LOCKLock to a service control manager database. For more information, see SCM Handles.
This type is declared in WinSvc.h as follows:

typedef LPVOID SC_LOCK;
SERVICE_STATUS_HANDLEHandle to a service status value. For more information, see SCM Handles.
This type is declared in WinSvc.h as follows:

typedef HANDLE SERVICE_STATUS_HANDLE;
SHORTShort integer (16 bits).
This type is declared in WinNT.h as follows:

typedef short SHORT;
SIZE_TThe maximum number of bytes to which a pointer can point. Use for a count that must span the full range of a pointer.
This type is declared in BaseTsd.h as follows:

typedef ULONG_PTR SIZE_T;
SSIZE_TSigned SIZE_T.
This type is declared in BaseTsd.h as follows:

typedef LONG_PTR SSIZE_T;
TBYTEA WCHAR if UNICODE is defined, a CHAR otherwise.
This type is declared in WinNT.h as follows:

#ifdef UNICODE
typedef WCHAR TBYTE;
#else
typedef unsigned char TBYTE;
#endif
TCHARA WCHAR if UNICODE is defined, a CHAR otherwise.
This type is declared in WinNT.h as follows:

#ifdef UNICODE
typedef WCHAR TCHAR;
#else
typedef char TCHAR;
#endif
UCHARUnsigned CHAR.
This type is declared in WinDef.h as follows:

typedef unsigned char UCHAR;
UHALF_PTRUnsigned HALF_PTR. Use within a structure that contains a pointer and two small fields.
This type is declared in Basetsd.h as follows:

#ifdef _WIN64
typedef unsigned int UHALF_PTR;
#else
typedef unsigned short UHALF_PTR;
#endif
UINTUnsigned INT.
This type is declared in WinDef.h as follows:

typedef unsigned int UINT;
UINT_PTRUnsigned INT_PTR.
This type is declared in BaseTsd.h as follows:

#if defined(_WIN64)
typedef unsigned __int64 UINT_PTR;
#else
typedef unsigned int UINT_PTR;
#endif
UINT32Unsigned INT32.
This type is declared in BaseTsd.h as follows:

typedef unsigned int UINT32;
UINT64Unsigned INT64.
This type is declared in BaseTsd.h as follows:

typedef usigned __int 64 UINT64;
ULONGUnsigned LONG.
This type is declared in WinDef.h as follows:

typedef unsigned long ULONG;
ULONGLONG64-bit unsigned integer.
This type is declared in WinNT.h as follows:

#if !defined(_M_IX86)
typedef unsigned __int64 ULONGLONG;
#else
typedef double ULONGLONG
#endif
ULONG_PTRUnsigned LONG_PTR.
This type is declared in BaseTsd.h as follows:

#if defined(_WIN64)
typedef unsigned __int64 ULONG_PTR;
#else
typedef unsigned long ULONG_PTR;
#endif
ULONG32Unsigned LONG32.
This type is declared in BaseTsd.h as follows:

typedef unsigned int ULONG32;
ULONG64Unsigned LONG64.
This type is declared in BaseTsd.h as follows:

typedef unsigned __int64 ULONG64;
USHORTUnsigned SHORT.
This type is declared in WinDef.h as follows:

typedef unsigned short USHORT;
USNUpdate sequence number (USN).
This type is declared in WinNT.h as follows:

typedef LONGLONG USN;
VOIDAny type.
This type is declared in WinNT.h as follows:

#define VOID void
WCHAR16-bit Unicode character. For more information, see Character Sets Used By Fonts.
This type is declared in WinNT.h as follows:

typedef wchar_t WCHAR;
WINAPICalling convention for system functions.
This type is declared in WinDef.h as follows:

#define WINAPI __stdcall
WORD16-bit unsigned integer.
This type is declared in WinDef.h as follows:

typedef unsigned short WORD;
WPARAMMessage parameter.
This type is declared in WinDef.h as follows:

typedef UINT_PTR WPARAM;
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