Note: Programs that use COM procedures must access the appropriate libraries with USE DFCOM. Programs that use Automation procedures must access the appropriate libraries with USE DFAUTO. Some procedures also require the USE DFWINTY module.
| Component Object Model (COM) Procedures (DFCOM) | ||
|---|---|---|
| Name | Procedure Type | Description |
| COMAddObjectReference | Function | Adds a reference to an object's interface. |
| COMCLSIDFromProgID | Subroutine | Passes a programmatic identifier and returns the corresponding class identifier. |
| COMCLSIDFromString | Subroutine | Passes a class identifier string and returns the corresponding class identifier. |
| COMCreateObjectByGUID | Subroutine | Passes a class identifier, creates an instance of an object, and returns a pointer to the object's interface. |
| COMCreateObjectByProgID | Subroutine | Passes a programmatic identifier, creates an instance of an object, and returns a pointer to the object's IDispatch interface. |
| COMGetActiveObjectByGUID | Subroutine | Passes a class identifier and returns a pointer to the interface of a currently active object. |
| COMGetActiveObjectByProgID | Subroutine | Passes a programmatic identifier and returns a pointer to the IDispatch interface of a currently active object. |
| COMGetFileObject | Subroutine | Passes a file name and returns a pointer to the IDispatch interface of an Automation object that can manipulate the file. |
| COMInitialize | Subroutine | Initializes the COM library. |
| COMIsEqualGUID | Function | Determines whether two GUIDs are the same. |
| COMQueryInterface | Subroutine | Passes an interface identifier and returns a pointer to an object's interface. |
| COMReleaseObject | Function | Indicates that the program is done with a reference to an object's interface. |
| COMStringFromGUID | Subroutine | Passes a GUID and returns a string of printable characters. |
| COMUninitialize | Subroutine | Uninitializes the COM library. |
| Automation Server Procedures (DFAUTO) | ||
| Name | Procedure Type | Description |
| AUTOAddArg | Subroutine | Passes an argument name and value and adds the argument to the argument list data structure. |
| AUTOAllocateInvokeArgs | Function | Allocates an argument list data structure that holds the arguments to be passed to AUTOInvoke. |
| AUTODeallocateInvokeArgs | Subroutine | Deallocates an argument list data structure. |
| AUTOGetExceptInfo | Subroutine | Retrieves the exception information when a method has returned an exception status. |
| AUTOGetProperty | Function | Passes the name or identifier of the property and gets the value of the Automation object's property. |
| AUTOGetPropertyByID | Function | Passes the member ID of the property and gets the value of the Automation object's property into the argument list's first argument. |
| AUTOGetPropertyInvokeArgs | Function | Passes an argument list data structure and gets the value of the Automation object's property specified in the argument list's first argument. |
| AUTOInvoke | Function | Passes the name or identifier of an object's method and an argument list data structure and invokes the method with the passed arguments. |
| AUTOSetProperty | Function | Passes the name or identifier of the property and a value, and sets the value of the Automation object's property. |
| AUTOSetPropertyByID | Function | Passes the member ID of the property and sets the value of the Automation object's property, using the argument list's first argument. |
| AUTOSetPropertyInvokeArgs | Function | Passes an argument list data structure and sets the value of the Automation object's property specified in the argument list's first argument. |
For more information on using these procedures, see Using COM and Automation Objects.