ChangePassphrase Method
Changes the password of the secret key.
Syntax
int ChangePassphrase(const QString& qsOldPassphrase, const QString& qsNewPassphrase);
Remarks
Call this method to change the password that protects the secret key.
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.)