Checbox

Eğer işine yarar ise vb.net te söylemek istediğini şu şekilde yapabilirsin.

Imports System
Imports System.Windows.Forms


Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
         DataGridView1.ColumnCount = 3
        DataGridView1.Columns(0).Name = "Product ID"
        DataGridView1.Columns(1).Name = "Product Name"
        DataGridView1.Columns(2).Name = "Product_Price"

        Dim row As String() = New String() {"1", "Product 1", "1000"}
        DataGridView1.Rows.Add(row)
        row = New String() {"2", "Product 2", "2000"}
        DataGridView1.Rows.Add(row)
        row = New String() {"3", "Product 3", "3000"}
        DataGridView1.Rows.Add(row)
        row = New String() {"4", "Product 4", "4000"}
        DataGridView1.Rows.Add(row)

        Dim chk As New DataGridViewCheckBoxColumn()
        DataGridView1.Columns.Add(chk)
        chk.HeaderText = "Check Data"
        chk.Name = "chk"
        DataGridView1.Rows(2).Cells(3).Value = True
        HighlightCheckBox()

    End Sub
    Private Sub HighlightCheckBox()
        For r As Integer = 0 To DataGridView1.RowCount - 1
            If DataGridView1(3, r).Value = True Then
                DataGridView1.Rows(r).DefaultCellStyle.BackColor = Color.Red
            End If
        Next
    End Sub

    Private Sub EndEditMode1(sender As System.Object, e As MouseEventArgs) Handles DataGridView1.MouseUp
        DataGridView1.EndEdit()
    End Sub


    Private Sub DataGridCellValueChanged(sender As DataGridView, e As DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
        If e.RowIndex = -1 Then Exit Sub
        Dim cb As DataGridViewCheckBoxCell = TryCast(DataGridView1(e.ColumnIndex, e.RowIndex), DataGridViewCheckBoxCell)
        If cb IsNot Nothing Then
            If cb.Value = True Then
                DataGridView1.Rows(e.RowIndex).DefaultCellStyle.BackColor = Color.Red
            Else
                DataGridView1.Rows(e.RowIndex).DefaultCellStyle.BackColor = Color.White
            End If
        End If
    End Sub
End Class

Bir yerdeki kod işime yaradı :)
Teşekkür ederim.
If DataGridView1(3, r).Value = True Then
DataGridView1.Rows(r).DefaultCellStyle.BackColor = Color.Red
End If