Installs a callback procedure for converting AddOnObject data into older format.
    GSErrCode  ACAPI_Install_AddOnObjectSaveOldFormatHandler (
        APIAddonObjectSaveOldFormatHandlerProc*     saveOldFormatProc
    );
    
Parameters
- saveOldFormatProc
 - [in] The callback procedure to convert AddOnObject data. Passing 
nullptrin this parameter uninstalls the previously installed handler function. 
Return Values
NoError- The function has completed with success.
 
For other common API errors see the API Errors document.
Remarks
This function should be called in the Initialize function of your add-on to pass the pointer of the APIAddOnObjectSaveOldFormatHandlerProc callback routine implemented for converting modules of the add-on into previous format.
Requirements
- Version: API 19 or later
 - Header: ACAPinc.h
 
See Also
APIAddOnObjectSaveOldFormatHandlerProc
ACAPI_Register_AddOnObjectHandler
AddOnObject Manager
API Functions