Showing success message after password change

[meysammahfouzi]

I've got the following ChangePassword component on change-password.htm page:

[ChangePassword]
slug_required = 0
mode = "submit"
flash_on = 1
redirect_on = 0
check_old_password = 1

After the form is submitted, the user will remain on the same page. Now I want to show a success message to them.

It's possible to check that change password got an error:

{% set arError = ChangePassword.getErrorMessage %}
{% if arError.message is not empty %}
    <p>{{ arError.message }}</p>
{% endif %}

But how to check the operation was successful? I don't won't to put the success message in the else statement because the first time that page loads that message will be shown.