ผมมี Radio buttom อ การตรวจสอบข้อมูล form ว่าผู้ใช้ได้ลืมใส่ค่าไหนบ้าง

If Me.rdoOperater1.Checked = False OR Me.rdoOperater2.Checked = False Then

If Me.rdoOperater.Checked = False Or Me.rdoTechnician.Checked = False Then
            MessageBox.Show("Please input (Position)")
            Exit Sub
        End If

If Me.rdoOperater.Checked = False And Me.rdoTechnician.Checked = False Then
            MessageBox.Show("Please input (Position)")
            Exit Sub
        End If

if Radiobutton1.checked = true then
msgbox("???",16,"???")

elseif Radiobutton2.checked = true then
msgbox("???",16"???")
end if

Imports System.Runtime.InteropServices
Public Class Form7
    Private _appPath As String

    Private Property AppPath(ByVal p1 As String) As String
        Get
            Return _appPath
        End Get
        Set(ByVal value As String)
            _appPath = value
        End Set
    End Property
    Private Const WM_DEVICECHANGE As Integer = &H219
    Private Const DBT_DEVICEARRIVAL As Integer = &H8000
    Protected Overrides Sub WndProc(ByRef m As Message)
        If m.Msg = WM_DEVICECHANGE Then
            If m.WParam.ToInt32() = DBT_DEVICEARRIVAL Then
                MessageBox.Show("Connect Flash Drive Success")
            End If
        End If
        MyBase.WndProc(m)
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
     Dim strPath As String = AppPath(Environment.CurrentDirectory)

        Dim OpenFile As New OpenFileDialog()
      
        OpenFile.InitialDirectory = strPath
        OpenFile.FileName = ""
       
        OpenFile.Filter = "Text files (*.txt)|*.txt"

      
        Dim Res As System.Windows.Forms.DialogResult = OpenFile.ShowDialog()
       
        If Res = System.Windows.Forms.DialogResult.Cancel Then Return

    
        txtFile.Text = OpenFile.FileName

    End Sub
End Class