Open Method
Opens the Open XML package archive.
Syntax
int Open();
Remarks
When this method is called, the class will attempt to open the archive specified in PackagePath and extract package properties, content types and parse the master relationships file in the archive.
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.)