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ITypeInfo::CreateInstance
punkOuter, riid, ppvObj)
IUnknown FAR* punkOuter
REFIID riid
VOID FAR* FAR* ppvObj
Creates a new instance of a type that describes a component object class
(coclass).
Parameters
punkOuter
A pointer to the controlling IUnknown. If NULL, then a stand-alone instance is
created. If valid, then an aggregate object is created.
riid
An ID for the interface the caller will use to communicate with the resulting
object.
ppvObj
On return, points to a pointer to an instance of the created object.
Return Value
The SCODE obtained from the returned HRESULT is one of the following:
SCODE
| Meaning
| S_OK
| Success.
| E_OUTOFMEMORY
| Out of memory.
| TYPE_E_WRONGTYPEKIND
| Type mismatch.
| E_INVALIDARG
| One or more of the arguments is invalid.
| E_NOINTERFACE
| OLE could not find an implementation of one or more required interfaces.
| TYPE_E_UNSUPFORMAT
| The type library has an old format.
| TYPE_E_INVALIDSTATE
| The type library could not be opened.
| Other returns
| Additional errors may be returned from GetActiveObject or CoCreateInstance.
|
Comments
For types that describe a component object class (coclass), CreateInstance creates a new instance of the class. Normally CreateInstance calls CoCreateInstance with the type description's GUID. For an Application object, it first calls GetActiveObject. If the application is active, GetActiveObject returns the active object; otherwise, if GetActiveObject fails, CreateInstance calls CoCreateInstance.
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