[บทเรียน,B4X] ตรวจสอบ FirstTime ใน MainPage

Sub Class_Globals
    Private mFirstTimeAppeared As Boolean = True


Private Sub B4XPage_Appear
   If mFirstTimeAppeared Then
   Else
   End If

   mFirstTimeAppeared = False
End Sub

Private Sub B4XPage_Appear
   If mFirstTimeAppeared Then
    Wait For (RetrieveNewDataForSomeSource) Complete (Updated As Boolean)
          If Updated Then UpdateDataViews
           '...
   End If
End Sub