Option Explicit On
Option Infer Off
Option Strict On
Public Class Form1
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        lstNames.Items.Add("Arnold,Craig")
        lstNames.Items.Add("Schwarzenegger,Arnold")
    End Sub
    Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
        Dim s As String = ""
        Dim c As Integer = 0
        s = txtName.Text.Trim
        For i As Integer = 0 To s.Length - 1 Step 1
            If s.Substring(i, 1) = " " Then
                c = c + 1
            End If
        Next
        If c = 1 Then
            lstNames.Items.Add(convertomatic(s, 0))
        ElseIf c = 0 Then
            MsgBox("You didn't enter a last name, please try again.", MsgBoxStyle.Critical, "Error")
        Else
            MsgBox("You may only enter One last name, please try again.", MsgBoxStyle.Critical, "Error")
        End If

    End Sub
    Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
        Dim i As Integer
        If lstNames.SelectedIndex >= 0 Then
            i = lstNames.SelectedIndex
            lstNames.Items.RemoveAt(i)
            lstNames.SelectedIndex = i - 1
        Else
            MsgBox("No name is selected", MsgBoxStyle.Critical, "Error")
        End If
    End Sub

    Private Sub btnGet_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGet.Click
        If lstNames.SelectedIndex >= 0 Then
            MsgBox(convertomatic(lstNames.SelectedItem.ToString, 1), MsgBoxStyle.OkOnly, "Name Gotten")
        Else
            MsgBox("No name is selected", MsgBoxStyle.Critical, "Error")
        End If
    End Sub

    Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
        Dim checks As Boolean = False
        Dim s As String = ""
        Do While checks = False
            s = InputBox("Please enter the name you are looking for", "Search").Trim
            If s = "" Then
                MsgBox("You didnt enter a name, try again.", MsgBoxStyle.Critical, "Error")
            ElseIf s.contains(" ") = True Then
                MsgBox("You may only enter a last name, try again.", MsgBoxStyle.Critical, "Error")
            Else
                checks = True
            End If
        Loop
        If searchomatic(s) = True Then
            MsgBox("The last name " & s & " was found.", MsgBoxStyle.OkOnly, "Name found")
        Else
            MsgBox("The last name " & s & " was not found.", MsgBoxStyle.OkOnly, "Name not found")
        End If
    End Sub

    Private Sub QuitToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles QuitToolStripMenuItem.Click
        Me.Close()
    End Sub


    Private Sub txtName_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtName.KeyPress
        If ((e.KeyChar < "a" OrElse e.KeyChar > "z") AndAlso (e.KeyChar < "A" OrElse e.KeyChar > "Z") AndAlso e.KeyChar <> " " AndAlso e.KeyChar <> ControlChars.Back) Then
            e.Handled = True
        End If
    End Sub
    Function convertomatic(ByVal s As String, ByVal i As Integer) As String
        Dim s1 As String
        Dim s2 As String
        If i = 0 Then
            s1 = s.Substring(0, s.IndexOf(" "))
            s2 = s.Substring(s.IndexOf(" ") + 1, (s.Length - 1) - s.IndexOf(" "))
            Return s2 & "," & s1
        ElseIf i = 1 Then
            s1 = s.Substring(0, s.IndexOf(","))
            s2 = s.Substring(s.IndexOf(",") + 1, (s.Length - 1) - s.IndexOf(","))
            Return s2 & " " & s1
        ElseIf i = 2 Then
            s2 = s.Substring(s.IndexOf(" ") + 1, (s.Length - 1) - s.IndexOf(" "))
            Return s2
        ElseIf i = 3 Then
            s1 = s.Substring(0, s.IndexOf(" "))
            Return s1
        Else
            Return ""
        End If
    End Function
    Function searchomatic(ByVal s As String) As Boolean
        Dim checks As Boolean = False
        For i As Integer = 0 To lstNames.Items.Count - 1 Step 1
            If convertomatic(convertomatic(lstNames.Items.Item(i).ToString, 1), 2).ToLower = s.ToLower Then
                Return True
            End If
        Next
        Return False
    End Function
End Class