Urgently Require some details in Vbulltin 3.6

[David_R]

We are trying to integrate vbulletin with another system to do that we are writing plugins,
but not sure which hook to use in following scenarios:

1> user is added via admin cp and normal registration. (Need hook name for both scenarios )
2> user password is changed via admincp or by usercp change pwd form. (Need hook name for both scenarios )
3> user is banned from admincp or from the front end. (Need hook name for both scenarios )
4> user is deleted from admincp ( we are using userdata_delete )

Please can you let me know the hook names for 1, 2 and 3 above