Prueba con esta función de Dev Ashish:
'************ Code Start **********
' This code was originally written by Dev Ashish.
' It is not to be altered or distributed,
' except as part of an application.
' You are free to use it in any application,
' provided the copyright notice is left unchanged.
'
' Code Courtesy of
' Dev Ashish
'
Global Const SW_HIDE = 0
Global Const SW_SHOWNORMAL = 1
Global Const SW_SHOWMINIMIZED = 2
Global Const SW_SHOWMAXIMIZED = 3
Private Declare Function apiShowWindow Lib "user32" _
Alias "ShowWindow" (ByVal hwnd As Long, _
ByVal nCmdShow As Long) As Long
Function fSetAccessWindow(nCmdShow As Long)
'Usage Examples
'Maximize window:
' ?fSetAccessWindow(SW_SHOWMAXIMIZED)
'Minimize window:
' ?fSetAccessWindow(SW_SHOWMINIMIZED)
'Hide window:
' ?fSetAccessWindow(SW_HIDE)
'Normal window:
' ?fSetAccessWindow(SW_SHOWNORMAL)
'
Dim loX As Long
Dim loForm As Form
On Error Resume Next
Set loForm = Screen.ActiveForm
If Err <> 0 Then 'no Activeform
If nCmdShow = SW_HIDE Then
MsgBox "Cannot hide Access unless " _
& "a form is on screen"
Else
loX = apiShowWindow(hWndAccessApp, nCmdShow)
Err.Clear
End If
Else
If nCmdShow = SW_SHOWMINIMIZED And loForm.Modal = True Then
MsgBox "Cannot minimize Access with " _
& (loForm.Caption + " ") _
& "form on screen"
ElseIf nCmdShow = SW_HIDE And loForm.PopUp <> True Then
MsgBox "Cannot hide Access with " _
& (loForm.Caption + " ") _
& "form on screen"
Else
loX = apiShowWindow(hWndAccessApp, nCmdShow)
End If
End If
fSetAccessWindow = (loX <> 0)
End Function
'************ Code End **********
Pegas este codigo en un modulo, lo grabas y lo usas asi:
Para ocultar la ventana de Access:
Me.Form.Visible= True ' Esto contrarresta unos problemas de
sincronizacion de access
fSetAccessWindow SW_HIDE ' Esta te oculta la ventana de access
fSetAccessWindow(SW_SHOWNORMAL) ' Esta te muestra nuevamente la ventana