Global Variabiles

[LaoMa]

I'm tring to use a global variable, but I got some problems.
here the architeture of my VBA.

1. I create a Class Module named DatiVent

Option Explicit
  Private m_Famiglia     As    String
  private m_Name         As    string
  .....

Public Property Get GetFamiglia() As String
    Famiglia = m_Famiglia
 End Property

 Public Property Set SetFamiglia(value)
    m_Famiglia = value
  End Property

.....

2. then I create a Module named VarVENT where I create a public variable

Public VARIABILI As DatiVent

3. I'm tring to use the variable in a Form object:

VARIABILI.SetFamiglia ("PIPPO")

it dosen't work, I'm not an expert, This is the first time I'm using a more complex architeture, someone could help me?
thank you in advance