DFCOM routines help you work with COM objects. To use a DFCOM routine, add the following statement to the program unit containing the routine:
USE DFCOM
Table E-7 summarizes DFCOM routines.
| Name | Description |
|---|---|
| COMAddObjectReference | Adds a reference to an object's interface. |
| COMCLSIDFromProgID | Passes a programmatic identifier and returns the corresponding class identifier. |
| COMCLSIDFromString | Passes a class identifier string and returns the corresponding class identifier. |
| COMCreateObjectByGUID | Passes a class identifier, creates an instance of an object, and returns a pointer to the object's interface. |
| COMCreateObjectByProgID | Passes a programmatic identifier, creates an instance of an object, and returns a pointer to the object's IDispatch interface. |
| COMGetActiveObjectByGUID | Passes a class identifier and returns a pointer to the interface of a currently active object. |
| COMGetActiveObjectByProgID | Passes a programmatic identifier and returns a pointer to the IDispatch interface of a currently active object. |
| COMInitialize | Initializes the COM library. |
| COMGetFileObject | Passes a file name and returns a pointer to the IDispatch interface of an Automation object that can manipulate the file. |
| COMQueryInterface | Passes an interface identifier and returns a pointer to an object's interface. |
| COMReleaseObject | Indicates that the program is done with a reference to an object's interface. |
| COMUninitialize | Uninitializes the COM library. |
For more information on these routines, see the Compaq Visual Fortran online Reference.