Closes the vault.
int CloseVault(bool bForce);
This method closes the currently-open vault.
(In CBVault, the Force parameter's value is ignored.)
Note: This method can only be called when Active is true.
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.)