modal form as owner

[newusername]

Hi,

here's my problem :
I have a main form [A] wich open a owned modal form [B].
I would like to have a form C, owned by B, wich open when B is loading .
Here is my code in B (pWizz is form C):

Private Sub on_load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
 
            Dim wz As pWizz
            wz = New pWizz
            wz.Owner = Me
            wz.Show()                       ' optional
            wz.TopMost = True          ' optional
 
End Sub

This is ok, except, since B is modal, form C receive no events (I can't move it nor click on any control of it).

So my question is : how can I do this (B must be modal to prevent any A inputs, B and C must both be able to receive inputs) while allowing C to receive click events ?

Many thanks for any ideas.