CloseMailbox Method
Removes all messages marked with 'Deleted' flag from the currently selected mailbox and unselect mailbox.
Syntax
int CloseMailbox();
Remarks
This method permanently removes all messages that have the 'Deleted' flag set from the current (selected) mailbox, and then closes (deselect) the mailbox.
Error Handling
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.)