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oleautomation
Indicates that an interface is compatible with OLE Automation.
Allowed on
Interface
Comments
Not allowed on dispinterfaces.
The oleautomation attribute indicates that an interface is compatible with OLE Automation. The
parameters and return types specified for its members must be OLE
Automation-compatible, as listed in the following table.
Type
| Description
| boolean
| Data item that can have the value True or False. The size corresponds to
VARIANT_BOOL.
| unsigned char
| 8-bit unsigned data item.
| double
| 64-bit IEEE floating-point number.
| float
| 32-bit IEEE floating-point number.
| Type
| Description
| int
| Signed integer, whose size is system-dependent.
| long
| 32-bit signed integer.
| short
| 16-bit signed integer.
| BSTR
| Length-prefixed string, as described in Chapter 5, "Dispatch Interfaces."
| CURRENCY
| 8-byte fixed-point number.
| DATE
| 64-bit floating-point fractional number of days since December 30, 1899.
| SCODE
| Built-in error type that corresponds to VT_ERROR.
| typedef enum myenum
| Signed integer, whose size is system-dependent.
| interface IDispatch *
| Pointer to IDispatch interface (VT_DISPATCH).
| interface IUnknown *
| Pointer to interface that does not derive from IDispatch (VT_UNKNOWN). (Any OLE interface can be represented by its IUnknown interface.)
| dispinterface Typename *
| Pointer to IDispatch-derived interface (VT_DISPATCH).
| coclass Typename *
| Pointer to a coclass name (VT_UNKNOWN).
| [oleautomation] interface Typename *
| Pointer to an interface that derives from IDispatch.
|
A parameter is compatible with OLE Automation if its type is an OLE
Automation-compatible type, a pointer to an OLE Automation-compatible type, or a
SAFEARRAY of an OLE Automation-compatible type.
A return type is compatible with OLE Automation if its type is an HRESULT or
is void. Methods in OLE Automation must return either HRESULT or void.
A member is compatible with OLE Automation if its return type and all of its
parameters are OLE-Automation compatible.
An interface is compatible with OLE Automation if it derives from IDispatch or IUnknown, if it has the oleautomation attribute, and if all of its VTBL entries are OLE-Automation compatible. For
32-bit systems, the calling convention for all methods in the interface must be
STDCALL. For 16-bit systems, all methods must have the CDECL calling
convention. Every dispinterface is OLE Automation-compatible.
Flags
TYPEFLAG_FOLEAUTOMATION
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