HRESULT LayOut();
Assigns VTBL offsets for virtual functions and instance offsets for per-instance data members, and creates the two type descriptions for dual interfaces.
The return value of the returned HRESULT is one of the following:
| Return value | Meaning |
|---|---|
| S_OK | Success. |
| STG_E_INSUFFICIENTMEMORY | Out of memory. |
| E_OUTOFMEMORY | Out of memory. |
| E_ACCESSDENIED | Cannot write to the destination. |
| TYPE_E_UNDEFINEDTYPE | Bound to unrecognized type. |
| TYPE_E_INVALIDSTATE | The state of the type library is not valid for this operation. |
| TYPE_E_WRONGTYPEKIND | Type mismatch. |
| TYPE_E_ELEMENTNOTFOUND | The element cannot be found. |
| TYPE_E_AMBIGUOUSNAME | More than one item exists with this name. |
| TYPE_E_SIZETOOBIG | The type information is too long. |
| TYPE_E_TYPEMISMATCH | Type mismatch. |
LayOut also assigns member ID numbers to the functions and variables, unless the TYPEKIND of the class is TKIND_DISPATCH. Call LayOut after all members of the type information are defined, and before the type library is saved.
Use ICreateTypeLib::SaveAllChanges to save the type information after calling LayOut. Other members of the ICreateTypeInfo interface should not be called after calling LayOut.
Note Different implementations of ICreateTypeInfo or other interfaces that create type information are free to assign any member ID numbers, provided that all members (including inherited members), have unique IDs. For examples, see the ICreateTypeInfo2 interface later in this chapter..