You can set properties for an Access form's Max and Min buttons and Close buttons seperately on the Properties tab, or by setting the Control Box to No (also on the Properties tab), all three buttons go.
The down side is that this will not hold if your forms are maximised! Even if you set your form not to appear maximised, if the user double clicks on the blue bar, the form will maximise within Access and the buttons will re-appear.
A way around that is to set the Pop-Up property to Yes, but when a user maximises this form by double clicking on the blue bar, all the Access controls are hidden behind the form. This may or may not be what you want the user to see.
Hope this helps,
Brendan