&reftitle.constants; &extension.constants;

`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.

  Only on 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.

  x64 only

`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`)

- A 64-bit floating point number representing the number of days (not seconds) since `December 31, 1899`. For example, `January 1, 1900` is `2.0`, `January 2, 1900` is `3.0`, etc. This is stored in the same representation as `VT_R8`.

`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`)

- Default to ANSI code page.

`CP_MACCP` (`int`)

- Macintosh code page.

`CP_OEMCP` (`int`)

- Default to OEM code page.

`CP_UTF7` (`int`)

- Unicode (UTF-7).

`CP_UTF8` (`int`)

- Unicode (UTF-8).

`CP_SYMBOL` (`int`)

- `SYMBOL` translations.

`CP_THREAD_ACP` (`int`)

- Current thread's ANSI code page

`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`)

- A return value that indicates that one of the parameter IDs does not correspond to a parameter on the method.

`MK_E_UNAVAILABLE` (`int`)

- iMoniker COM status code, return on errors where the function call failed due to unavailability.

`LOCALE_NEUTRAL` (`int`)

- The neutral locale. This constant is generally not used when calling NLS APIs. Instead, use LOCALE_SYSTEM_DEFAULT.

`LOCALE_SYSTEM_DEFAULT` (`int`)

- The default locale for the operating system.