Sets the modification time of a vault item.
int SetFileModificationTime(const QString& qsFileName, const QDateTime& qdtModificationTime);
This method sets the modification time of the vault item (file, directory, symbolic link, or alternate stream) specified by FileName.
The value passed for FileName must be a vault-local absolute path.
The ModificationTime parameter specifies the new modification time for the vault item, which must be specified in UTC.
Note: This method can only be called when Active is true, and cannot be called within events.
This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)