https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/nf-wdm-cmcallbackreleasekeyobjectidex
CmCallbackReleaseKeyObjectIDEx function (wdm.h) - Windows drivers | Microsoft Learn
The CmCallbackReleaseKeyObjectIDEx routine frees an object name string obtained from the CmCallbackGetKeyObjectIDEx routine.
windows driversfunctionwdmhmicrosoft