Determines if a given CLSID represents an OLE 1 object. This is one of several
OLE compatibility functions. You can use these functions to determine if an
object class is from OLE 1 and to convert objects between OLE 1 and OLE 2 storage
| REFCLSID rclsid,
||//CLSID to check
Indicates the reference to the CLSID to check.
Indicates that the CLSID refers to an OLE 1 object.
Indicates that the CLSID does not refer to an OLE 1 object.
function is useful for preventing linking to embedded OLE 1 objects within a
container. Once a container has determined that copied data represents an
embedded object, CoIsOle1Class
can be called to determine whether the embedded object is an OLE 1 object. If CoIsOle1Class
returns S_TRUE, the container does not offer Link Source.
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