Retrieves the ProgID for a given CLSID.
| REFCLSID clsid,
||//The CLSID for which the ProgID is requested
| LPOLESTR * lplpszProgID
||//Receives a pointer to the requested ProgID on return
Specifies the CLSID for which the ProgID is requested.
Receives a pointer to the requested ProgID on return.
Indicates the ProgID was returned successfully.
Indicates class not registered in the registry.
Indicates error reading registry.
Every OLE 2 object class listed in the Insert Object dialog box must have a programmatic identifier
(ProgID), a string that uniquely identifies a given class. In addition to
determining the eligibility for the Insert Object dialog box, the ProgID can be
used as an identifier in a macro programming language to identify a class.
Finally, the ProgID is also the class name used for an OLE 2 class when placed in an
OLE 1 container.
function uses entries in the registry to do the conversion. OLE 2 application
authors are responsible for correctly configuring the registry at application
The ProgID string must be different than the class name of any OLE 1
application, including the OLE 1 version of the same application, if there is one. In
addition, a ProgID string must not contain more than 39 characters or start with
a digit. Except for a single period, it cannot contain any punctuation
The ProgID must never
be shown to the user in the user interface. If you need a short human-readable
string for an object, call IOleObject::GetUserType
function can be called to create a CLSID from a given ProgID. CLSIDs can be
freed with the task allocator (refer to the CoGetMalloc
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