VB.NET Technology

Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
Imports System.Linq
Imports System.Text
Imports System.Windows.Forms
Imports System.IO
Public Class Form1
        Private Sub Button1_Click(ByVal sender As System.Object, 
	ByVal e As System.EventArgs) Handles Button1.Click
        Dim Lines As String() = File.ReadAllLines("TextFile1.txt")
        Dim maxZ As Integer = 0
        For Each line As String In Lines
            Dim SplitString As String() = line.Split(" "c)
            If SplitString.Length > 2 Then
                Try
                    If Integer.Parse(SplitString(2)) > maxZ Then
                        maxZ = Integer.Parse(SplitString(2))
                    End If
                Catch
                End Try
            End If
        Next
        TextBox2.Text = maxZ.ToString()
    End Sub
    Private Sub Button2_Click(ByVal sender As System.Object, 
	ByVal e As System.EventArgs) Handles Button2.Click
        Dim Lines As String() = File.ReadAllLines("TextFile1.txt")
        Dim maxX As Integer = 0
        For Each line As String In Lines
            Dim SplitString As String() = line.Split(" "c)
            If SplitString.Length > 3 Then
                Try
                    If Integer.Parse(SplitString(3)) > maxX Then
                        maxX = Integer.Parse(SplitString(3))
                    End If
                Catch
                End Try
            End If
        Next
        TextBox3.Text = maxX.ToString()
    End Sub
    Private Sub btnFindMaxY_Click(ByVal sender As System.Object, 
	ByVal e As System.EventArgs) Handles btnFindMaxY.Click
        Dim Lines As String() = File.ReadAllLines("TextFile1.txt")
        Dim maxY As Integer = 0
        For Each line As String In Lines
            Dim SplitString As String() = line.Split(" "c)
            If SplitString.Length > 1 Then
                Try
                    If Integer.Parse(SplitString(1)) > maxY Then
                        maxY = Integer.Parse(SplitString(1))
                    End If
                Catch
                End Try
            End If
        Next
        TextBox1.Text = maxY.ToString()
    End Sub
End Class