' Open File ShowDialog
    Public Function OpenFile(ByVal TypeFile As String)
        Dim _FileFull As String = ""
        Dim _typefile As String = ""

        If TypeFile = "pic" Then
            _typefile = "Picture Files (*.JPG)|*.JPG;"

        ElseIf TypeFile = "word" Then
            _typefile = "Office Documents (*.doc)|*.doc; "

        ElseIf TypeFile = "txt" Then
            _typefile = "text Documents (*.txt)|*.txt; "

        Else
            _typefile = "PDF File (*.pdf)|*.pdf"
        End If
        Try
            Dim dlg As OpenFileDialog = New OpenFileDialog()
            dlg.Filter = _typefile
            dlg.Title = "Open"
            If dlg.ShowDialog() = System.Windows.Forms.DialogResult.OK Then
                _FileFull = dlg.FileName

                '=============================================
                If TypeFile = "pic" Then
                    Dim a As IO.FileInfo = New IO.FileInfo(_FileFull)
                    If a.Length > 20000 Then
                        Dim aaa = a.Length
                        MessageBox.Show("กรุณาเลือกไฟล์ขนาดไม่เกิน 200 KB")
                        OpenFile("pic")
                    End If
                End If

                '=============================================

            End If


        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
        Return _FileFull
    End Function