A basic Access question about calling a sub from a button

Hi all!
I have this form on which lies a button that calls another form. Very simply, in the On Open event of this button, I call a sub that will open the form, as follow:

=Open("frmMyForm")

Now the code read something like this:

Function Open(MyForm As string) As Integer

Select Case MyForm
Case "frmMyForm"
DoCmd.OpenForm MyForm

bla bla bla...

Can I pass the form as an object instead of a string? If so what do I have to change in the above?
I tried (and tons of variations):

=Open(frmMyForm)

Function Open(MyForm as object)

with no obvious result.

Anyone's two cents would be appreciated.

p.s. Access 2000

Seems like your going about this the long way? If you pass the Form as a Form then there is no need for a select case statement. Just
the call to open the form.

DoCmd.OpenForm "MyForm"

Hi there Rob,

I was really looking into how to pass diff. arguments type to a sub using the OnEvent property, beside from string type as in =MySub("frmname") ,well if it is possible.

I presume I went asking about this the wrong way. I couldn't care less about opening a form.
lol