PromoteVersion Method
Promotes a previous file resource version to be the current version.
Syntax
void __fastcall PromoteVersion(String FileId, String VersionId);
Remarks
This method promotes a previous version of the file resource specified by FileId to be the current version.
VersionId specifies the version that should be promoted. Box will make a copy of it to use as the new version.
Note that Box only tracks file versions for paid accounts.