Sets the size of a file or alternate stream.
func (obj *CBVault) SetFileSize(FileName string, Size int64, Password string) error
This method sets the size of the file or alternate stream specified by FileName.
The value passed for FileName must be a vault-local absolute path.
The Size parameter specifies the new size of the file or alternate stream, which must be greater than or equal to 0.
Note: This method can only be called when Active is true, and cannot be called within events.