ITypeInfo::CreateInstance method (oaidl.h)
Creates a new instance of a type that describes a component object class (coclass).
Syntax
HRESULT CreateInstance(
[in] IUnknown *pUnkOuter,
[in] REFIID riid,
[out] PVOID *ppvObj
);
Parameters
[in] pUnkOuter
The controlling IUnknown. If Null, then a stand-alone instance is created. If valid, then an aggregate object is created.
[in] riid
An ID for the interface that the caller will use to communicate with the resulting object.
[out] ppvObj
An instance of the created object.
Return value
Return code | Description |
---|---|
|
Success. |
|
One or more of the arguments is not valid. |
|
Insufficient memory to complete the operation. |
|
OLE could not find an implementation of one or more required interfaces. |
Additional errors may be returned from GetActiveObject or CoCreateInstance.
Remarks
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.
Requirements
Requirement | Value |
---|---|
Target Platform | Windows |
Header | oaidl.h |