Append Method
Adds specified file to an existing archive.
Syntax
int Append();
Remarks
The file contained in the FileDecompressedName property will be appended to the archive specified by ArchiveFile.
This method may only be used to add files to an existing archive. To add files to a new archive, Compress method should be used.
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.)