COM
From Xojo Documentation
Module
Classes and functions to deal with COM components (i.e. ActiveX Controls and Automation).
Notes
Refer to the Microsoft COM documentation for full details on all classes, constants, structures, etc. used by COM:
Classes
Each class is described in its own section.
| Name | Super Class | Description |
|---|---|---|
| IUnknown | The common interface supported by all COM objects | |
| IDispatch | IUnknown | The common interface exposed by Automation servers |
| IEnumVARIANT | IUnknown | This interface provides a way to enumerate a collection of variants |
| IPicture | IUnknown | This interface manages a picture object and its properties |
| COMException | RuntimeException | Raised when a COM exception is encountered |
| Methods | |||||
|
Class Constants
Result constants
| Class Constant | Description |
|---|---|
| S_OK | Result returned without error. |
| S_FALSE | Result returned with an error. |
Invoke constants
These constants can be passed as flags to the IDispatch.Invoke method
| Class Constant | Description |
|---|---|
| DISPATCH_METHOD | The member is invoked as a method. If a property has the same name, both this and the DISPATCH_PROPERTYGET flag may be set. |
| DISPATCH_PROPERTYGET | The member is retrieved as a property or data member. |
| DISPATCH_PROPERTYPUT | The member is changed as a property or data member. |
| DISPATCH_PROPERTYPUTREF | The member is changed by a reference assignment, rather than a value assignment. This flag is valid only when the property accepts a reference to an object. |
Other constants
| Class Constant | Description |
|---|---|
| LOCALE_USER_DEFAULT | The user's default locale context in which to interpret arguments of IDispatch.Invoke. |
| SIZEOF_VARIANT | Returns the size of an OLE VARIANT. |