Msgbox when textbox not filled but on choice (yes/no)

[djemy1975]

Dear developpers,

I want to have a pop up msgbox when data is not entered in some textboxes in my form ,but on choice,i.e :I would not be obliged to enter records in ("txtPO","txtPO1","txtPO2","txtPO3") unless I could save my data.

I have this piece of code:

'If Me.txtPO.Value = "" And Me.txtPO1 = "" And Me.txtPO2 = "" And Me.txtPO3 = "" Then'MsgBox "Vous devez insérer le numéro de bon de commande s'il existe!", vbOKCancel, "Bon de Commande"
'Exit Sub
'End If

Could some one help me to custom this code to be able either fill in those textboxes or let them blank.

Herewith my file also to make more clear.

Thanks in advance,

[gmaxey]

If txtPO.Value = "" Or txtPO1 = "" Or txtPO2 = "" Or txtPO3 = "" Then
   If MsgBox("One or more text fields is empty.  Do you want to go back and fill them in?", vbQuestion + vbYesNo, "EMPTY FIELD") = vbYes Then
     Exit Sub
   End If
 End If
 'Go on processing

[djemy1975]

thank you for your reply.I will test it and make you know.

Thanks,

[djemy1975]

If txtPO.Value = "" Or txtPO1 = "" Or txtPO2 = "" Or txtPO3 = "" Then
   If MsgBox("One or more text fields is empty.  Do you want to go back and fill them in?", vbQuestion + vbYesNo, "EMPTY FIELD") = vbYes Then
     Exit Sub
   End If
 End If
 'Go on processing

Many thanks .It is exaclty what I need...