User controls and validation

[Vili]

Hi all

I am making an asp.net 2.0 website with visual studio 2005
professional

I have user control A that has two user control B's. Both A and B
implement iValidator interface and have CustomValidator Controls and
RequiredFieldValidation controls. I use control A in an Wizard
control.

After control A has loaded and the user has filled up textfields etc
how do I get controls B to validate and show possible errors at the
same time as control A when pressing the next step button?

Vili