[]在DataGrid中添加图片列的代码何解

[求助]在DataGrid中添加图片列的代码何解
在网上找到一段代码，主要功能在DataGrid中添加图片列，但我不知代码的意思，不知那位兄弟姐妹帮忙解释一下，先谢谢了。

Imports   System
Imports   System.Windows.Forms
Imports   System.Drawing
Imports   System.Data
Imports   System.Collections

Public   Class   DataGridImageCell
        Inherits   DataGridTextBoxColumn
        Private   theImages1   As   ArrayList
        Private   _bRect   As   Boolean
        Private   _rowNumber   As   Integer   =   0

        Property   RowNumber()   As   Integer
                Get
                        Return   _rowNumber
                End   Get
                Set(ByVal   Value   As   Integer)
                        _rowNumber   =   Value
                End   Set
        End   Property

        Property   bRect()   As   Boolean
                Get
                        Return   _bRect
                End   Get
                Set(ByVal   Value   As   Boolean)
                        _bRect   =   Value
                End   Set
        End   Property

        Public   Sub   New()
                bRect   =   False
        End   Sub

        Public   Property   theImages()   As   ArrayList
                Get
                        Return   theImages1
                End   Get
                Set(ByVal   Value   As   ArrayList)
                        theImages1   =   Value
                End   Set
        End   Property

        Public   Sub   PaintRect()
                Me.Invalidate()
        End   Sub

        Protected   Overloads   Overrides   Sub   Paint(ByVal   g   As   System.Drawing.Graphics,   ByVal   bounds   As   System.Drawing.Rectangle,   ByVal   [source]   As   System.Windows.Forms.CurrencyManager,   ByVal   rowNum   As   Integer,   ByVal   backBrush   As   System.Drawing.Brush,   ByVal   foreBrush   As   System.Drawing.Brush,   ByVal   alignToRight   As   Boolean)