There are several ways to do this...
This being one of them...
With this method when the password is typed it can be seen...Others make the password like ****
Just wanted to give you some type of answer...
On the "On Click" Event of your button to open the form just add this code...and change the bolded areas
' Code Starts Here
Dim strInput As String
Dim strMsg As String
Beep
strMsg = "This option is password protected..." & vbCrLf & vbLf & "Please enter the ''Password'' to gain access."
strInput = InputBox(Prompt:=strMsg, title:="Access Password Required")
If strInput = "A PASSWORD HERE" Or _
strInput = "ANOTHER PASSWORD HERE" Then 'password is correct
DoCmd.OpenForm "YOUR FORM NAME"
Else 'password is incorrect
MsgBox "Incorrect Password!" & vbCrLf & vbLf & "You have entered an ''Invalid Password''" & vbCrLf & vbLf & "Please Try Again.", vbCritical, "Invalid Password"
Exit Sub
End If
' Code Ends Here
Hope this helps...if you want the password hidden just let me know and I'll answer you tomorrow with that inforamtion.