The below code will disable (hide) all menu bars and tool bars. Ensure that you have a way to enable (unhide) the menu bars and tool bars (transparent command button) before you hide them!
'this will disable all menu bars and tool bars
Dim i As Integer
For i = 1 To CommandBars.Count
CommandBars(i).Enabled = False
Next i
'this will enable all menu bars and tool bars
Dim i As Integer
For i = 1 To CommandBars.Count
CommandBars(i).Enabled = True
Next i
An added bonus is the right click option is disabled if the menu bars are disabled with the above code.
Use the 'ShowToolbar' command if you need to display a toolbar...
DoCmd.ShowToolbar "YourToolBarNameHere", acToolbarYes
This will hide a toolbar when needed...
DoCmd.ShowToolbar "YourToolBarNameHere", acToolbarNo
You can also hide/unhide the database window with code...
'Hide the database window
DoCmd.SelectObject acTable, , True
DoCmd.RunCommand acCmdWindowHide
'Unhide the database window
DoCmd.SelectObject acTable, , True
HTH