Normally Access should have created a Function in the module. You can refer to that function from a form just by 'calling' it...
For example: Module1 contains this
'------------------------------------------------------------
' Macro1
'
'------------------------------------------------------------
Function Macro1()
DoCmd.OpenForm "Formulier1", acNormal, "", "", , acNormal
DoCmd.Maximize
End Function
If you'd like to run this code from within another form, you could do this:
Create a button (or another control) and in the 'onClick' option you add the following program code:
Call Macro1
Hope it works!
Greetz,
Seth