Usage Information - Classes
COM classes (so-called
coclasses) are wrapped by ImportTypeLib. They are mainly used in conjunction with
interfaces.
Creating an instance
Creating and instance of a class is the most common thing to do with it.
ptr := ITL_CoClassWrapper.__New([IID])
This form is not directly used by a script, Instead, the
new operator can be used:
lib := ImportTypeLib("C:\Path\To\MyLib.tlb")
ptr := new lib.MyClass()
Parameter
| IID |
In the form showed above, without parameters, a new class instance is created for the default interface of the coclass.
If no such default exists, an exception is thrown.
To prevent that or to use another than the default interface, an IID may be given. If the interface is part of the type library itself, the IID may be obtained and used like so:
IID_IMyInterface := lib.GetGUID("IMyInterface")
instance := new lib.MyClass(IID_IMyInterface)
|
Returns
The returned
ptr is not an object, but a pointer.
This pointer can be enwrapped with the corresponding
interface instance like so:
obj := new lib.IMyInterface(ptr)
Throws
If no IID is given and there's no default either, if the specified IID is not registered within the system, or if any other error occurs, an exception is thrown.
Constants and static variables
Those are not (yet) supported in a class.