question about registration

[mikotoiii]

How does the registration work on the wordpress side? Can I use any plugin to generate a registration form, or is there an easy way with the plugin to just call a short code to display the phpbb3 registration page in the iframe?

[axew3]

Can I use any plugin to generate a registration form

you can use wp_login (wp_meta default meta widget) or point to WP login page. Or use wp_w3all login widget. Any other plugin that build logins, if that do not point directly to wp_login, but will use another different code to login user on WP, probably will not work. Looking to solve about this.
If the iframe mode is installed, than the registration page called from WordPress, will point to iframe mode in phpBB.
Users can register/login/out using phpBB or WP.