Public Class LV
    Inherits System.Windows.Forms.ListView

    Friend Selected As Object

    Public Sub New()
        MyBase.New()
        AllowDrop = False
        Font = New Font("arial", 8, FontStyle.Bold)
        Dock = DockStyle.Fill
        FullRowSelect = True
        View = View.Details
        SetStyle((ControlStyles.OptimizedDoubleBuffer Or ControlStyles.AllPaintingInWmPaint), True)
        SetStyle(ControlStyles.EnableNotifyMessage, True)
    End Sub
    Protected Overrides Sub OnNotifyMessage(ByVal m As Message)
        Exit Sub
        If (m.Msg <> 20) Then
            MyBase.OnNotifyMessage(m)
        End If
    End Sub
#Region "Listview Sort"
    Private m_SortingColumn As ColumnHeader
    Public Sub ColumnClick(ByVal sender As Object, ByVal e As System.Windows.Forms.ColumnClickEventArgs) Handles MyBase.ColumnClick
        Dim new_sorting_column As ColumnHeader = sender.Columns(e.Column)
        Dim sort_order As System.Windows.Forms.SortOrder
        If m_SortingColumn Is Nothing Then
            sort_order = SortOrder.Ascending
        Else
            If new_sorting_column.Equals(m_SortingColumn) Then
                If m_SortingColumn.Text.StartsWith("+") Then
                    sort_order = SortOrder.Descending
                Else
                    sort_order = SortOrder.Ascending
                End If
            Else
                sort_order = SortOrder.Ascending
            End If
            m_SortingColumn.Text = m_SortingColumn.Text.Substring(1)
        End If
        m_SortingColumn = new_sorting_column
        If sort_order = SortOrder.Ascending Then
            m_SortingColumn.Text = "+" & m_SortingColumn.Text
        Else
            m_SortingColumn.Text = "-" & m_SortingColumn.Text
        End If
        If sender Is Nothing Then Exit Sub
        sender.ListViewItemSorter = New clsListviewSorter(e.Column, sort_order)
        sender.Sort()
        sender.ListViewItemSorter = Nothing
    End Sub
    Public Class clsListviewSorter
        Implements IComparer
        Private m_ColumnNumber As Integer
        Private m_SortOrder As SortOrder
        Public Sub New(ByVal column_number As Integer, ByVal sort_order As SortOrder)
            m_ColumnNumber = column_number
            m_SortOrder = sort_order
        End Sub
        Public Function Compare(ByVal x As Object, ByVal y As Object) As Integer Implements System.Collections.IComparer.Compare
            Dim item_x As ListViewItem = DirectCast(x, ListViewItem)
            Dim item_y As ListViewItem = DirectCast(y, ListViewItem)
            Dim string_x As String
            If item_x.SubItems.Count <= m_ColumnNumber Then
                string_x = ""
            Else
                string_x = item_x.SubItems(m_ColumnNumber).Text
            End If
            Dim string_y As String
            If item_y.SubItems.Count <= m_ColumnNumber Then
                string_y = ""
            Else
                string_y = item_y.SubItems(m_ColumnNumber).Text
            End If
            If m_SortOrder = SortOrder.Ascending Then
                If IsNumeric(string_x) And IsNumeric(string_y) Then
                    Return Val(string_x).CompareTo(Val(string_y))
                ElseIf IsDate(string_x) And IsDate(string_y) Then
                    Return DateTime.Parse(string_x).CompareTo(DateTime.Parse(string_y))
                Else
                    Return String.Compare(string_x, string_y)
                End If
            Else
                If IsNumeric(string_x) And IsNumeric(string_y) Then
                    Return Val(string_y).CompareTo(Val(string_x))
                ElseIf IsDate(string_x) And IsDate(string_y) Then
                    Return DateTime.Parse(string_y).CompareTo(DateTime.Parse(string_x))
                Else
                    Return String.Compare(string_y, string_x)
                End If
            End If
        End Function
    End Class
#End Region
End Class