预定义常量
下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。
| 常量 | 描述 | 说明 |
|---|---|---|
CLSCTX_INPROC_SERVER
(int)
|
The code that creates and manages objects of this class is a DLL that runs in the same process as the caller of the function specifying the class context. | |
CLSCTX_INPROC_HANDLER
(int)
|
The code that manages objects of this class is an in-process handler. This is a DLL that runs in the client process and implements client-side structures of this class when instances of the class are accessed remotely. | |
CLSCTX_LOCAL_SERVER
(int)
|
The EXE code that creates and manages objects of this class runs on same machine but is loaded in a separate process space. | |
CLSCTX_REMOTE_SERVER
(int)
|
A remote context. The code that creates and manages objects of this class is run on a different computer. | |
CLSCTX_SERVER
(int)
|
Indicates server code, whether in-process, local, or remote. This
definition ORs CLSCTX_INPROC_SERVER,
CLSCTX_LOCAL_SERVER, and
CLSCTX_REMOTE_SERVER.
|
|
CLSCTX_ALL
(int)
|
Indicates all class contexts. This definition ORs
CLSCTX_INPROC_HANDLER and
CLSCTX_SERVER.
|
|
VT_NULL
(int)
|
NULL pointer reference. | |
VT_EMPTY
(int)
|
A property with a type indicator of VT_EMPTY has
no data associated with it; that is, the size of the value is zero.
|
|
VT_INT
(int)
|
4-byte signed integer value (equivalent to
VT_I4).
|
|
VT_I1
(int)
|
1-byte signed integer. | |
VT_I2
(int)
|
Two bytes representing a 2-byte signed integer value. | |
VT_I4
(int)
|
4-byte signed integer value. | |
VT_I8
(int)
|
8-byte signed integer value. | 仅限 x64 |
VT_UINT
(int)
|
4-byte unsigned integer (equivalent to
VT_UI4).
|
|
VT_UI1
(int)
|
1-byte unsigned integer. | |
VT_UI2
(int)
|
2-byte unsigned integer. | |
VT_UI4
(int)
|
4-byte unsigned integer. | |
VT_UI8
(int)
|
8-byte unsigned integer. | 仅限 x64 |
VT_R4
(int)
|
32-bit IEEE floating point value. | |
VT_R8
(int)
|
64-bit IEEE floating point value. | |
VT_BOOL
(int)
|
Boolean value. | |
VT_ERROR
(int)
|
Error code; containing the status code associated with the error. | |
VT_CY
(int)
|
8-byte two's complement integer (scaled by 10,000). | |
VT_DATE
(int)
|
64 位浮点数，表示自 December 31, 1899 以来的天数（不是秒）。例如，January 1, 1900
是 2.0，January 2, 1900 是 3.0 等。这与 VT_R8 的存储方式相同 。
|
|
VT_BSTR
(int)
|
Pointer to a null-terminated Unicode string. | |
VT_DECIMAL
(int)
|
A decimal structure. | |
VT_UNKNOWN
(int)
|
A pointer to an object that implements the IUnknown interface. | |
VT_DISPATCH
(int)
|
A pointer to a pointer to an object was specified. | |
VT_VARIANT
(int)
|
A type indicator followed by the corresponding value.
VT_VARIANT can be used only with
VT_BYREF.
|
|
VT_ARRAY
(int)
|
If the type indicator is combined with
VT_ARRAY by an OR operator, the value is a pointer to a
SAFEARRAY. VT_ARRAY
can use the OR with the following data types: VT_I1,
VT_UI1, VT_I2, VT_UI2,
VT_I4, VT_UI4, VT_INT,
VT_UINT, VT_R4, VT_R8,
VT_BOOL, VT_DECIMAL, VT_ERROR,
VT_CY, VT_DATE, VT_BSTR,
VT_DISPATCH, VT_UNKNOWN and
VT_VARIANT.
|
|
VT_BYREF
(int)
|
If the type indicator is combined with VT_BYREF
by an OR operator, the value is a reference. Reference types are
interpreted as a reference to data, similar to the reference type in
C++.
|
|
CP_ACP
(int)
|
默认为 ANSI 编码页。 | |
CP_MACCP
(int)
|
Macintosh code page. | |
CP_OEMCP
(int)
|
默认为 OEM 编码页。 | |
CP_UTF7
(int)
|
Unicode (UTF-7). | |
CP_UTF8
(int)
|
Unicode (UTF-8). | |
CP_SYMBOL
(int)
|
SYMBOL translations.
|
|
CP_THREAD_ACP
(int)
|
当前线程的 ANSI 编码页 | |
VARCMP_LT
(int)
|
The left bstr is less than right
bstr.
|
|
VARCMP_EQ
(int)
|
The two parameters are equal. | |
VARCMP_GT
(int)
|
The left bstr is greater than right
bstr.
|
|
VARCMP_NULL
(int)
|
Either expression is NULL. | |
NORM_IGNORECASE
(int)
|
Ignore case sensitivity. | |
NORM_IGNORENONSPACE
(int)
|
Ignore nonspacing characters. | |
NORM_IGNORESYMBOLS
(int)
|
Ignore symbols. | |
NORM_IGNOREWIDTH
(int)
|
Ignore string width. | |
NORM_IGNOREKANATYPE
(int)
|
Ignore Kana type. | |
NORM_IGNOREKASHIDA
(int)
|
Ignore Arabic kashida characters. | Availability is dependent upon under lying library. |
DISP_E_DIVBYZERO
(int)
|
A return error that indicates a divide by zero error. | |
DISP_E_OVERFLOW
(int)
|
An error that indicates that a value could not be coerced to its expected representation. | |
DISP_E_BADINDEX
(int)
|
An error that indicates that an array index does not exist. | |
DISP_E_PARAMNOTFOUND
(int)
|
返回值表示某个参数 ID 与方法上的参数不对应。 | |
MK_E_UNAVAILABLE
(int)
|
iMoniker COM status code, return on errors where the function call failed due to unavailability. | |
LOCALE_NEUTRAL
(int)
|
中立地区。调用 NLS API 时一般不使用该常量。而是使用 LOCALE_SYSTEM_DEFAULT。 | |
LOCALE_SYSTEM_DEFAULT
(int)
|
操作系统的默认区域设置。 |
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