OleUninitialize

Closes the OLE library, freeing any resources that it maintains.

oid OleUninitialize();

Comments
You should call this function on application shutdown, as the last call made to the OLE library. OleUninitialize calls the CoUninitialize function internally to shut down the OLE Component Object(COM) Library.

The OleInitialize and OleUninitialize calls must be balanced

if there are multiple calls to the OleInitialize function, there must be the same number of calls to OleUninitialize: Only the OleUninitialize call corresponding to the OleInitialize call that actually initialized the COM library can close it.