Loads a schema file describing a Transaction Set.
int LoadSchema(const QString& qsFileName);
This method parses the File and loads it into an internal schema list. The class will attempt to automatically detect the SchemaFormat.
If the schema file does not exist or cannot be parsed as an EDI schema, the class fails with an error.
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.)