detailed scanning of unwanted files - vb.net

Question

i am trying to make launcher for my server, but i am kinda worried, is there any way that i can make a list of unwanted files in browsed directory, and if script finds any of those files when i press this button it will show like this warning message, ive tried a couple of things but none works
Imports System.IO
Public Class imeprezime
Private Sub Label1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label1.Click
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If (FolderBrowserDialog1.ShowDialog() = DialogResult.OK) Then
TextBox2.Text = FolderBrowserDialog1.SelectedPath
End If
End Sub
Private Sub connect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles connect.Click
Dim cleoPath As String
Dim filePath As String
filePath = System.IO.Path.Combine(TextBox2.Text, "gta_sa.exe")
cleoPath = System.IO.Path.Combine(TextBox2.Text, "cleo")
If File.Exists(filePath) Then
If Directory.Exists(cleoPath) Then
MsgBox("Pronasli smo cleo fajl u vasem GTA root folderu. Da se konektujete na server morate ga obrisati.")
Else
Dim p() As Process
p = Process.GetProcessesByName("gta_sa")
If p.Count > 0 Then
MsgBox("Vec imate pokrenut GTA San Andreas.")
Else
' Process is not running
End If
End If
Else
MsgBox("Da se konektujete morate locirati GTA San Andreas folder.")
End If
End Sub
Private Sub imeprezime_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
End Class