ImportFromFile Method
Loads a key from a file.
Syntax
int ImportFromFile(const QString& qsFilename);
Remarks
Use this method to load a key, either public or secret, from a file.
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.)