Visual Studio 2015将图像添加到具有坐标的面板

Question

我在面板上方都具有一个宽度相同的宽度325的追踪栏。该追踪栏的最大值为200。在发生鼠标按下事件时，我试图将图像和文本添加到面板上，该图像和文字是一个小点，并垂直对齐轨迹栏箭头。我首先将面板宽度除以200得到位置（左）。 intStepNumber是轨迹栏位置值。结果是图像未与箭头对齐，轨迹栏值越高，偏移量越大。我还添加了10以补偿图像宽度，使其居中。

    Private Sub TrackBar_Editor_MouseDown(sender As Object, e As MouseEventArgs) Handles TrackBar_Editor.MouseDown

    If e.Button = Windows.Forms.MouseButtons.Right Then
        For i = 1 To 5
            If int_Tag_used(i) = 0 Then
                '// Test all other tab to be sure there is no a duplicate placed.
                For J = 1 To 5
                    If int_Tag_Storage(J) = intStepNumber + 1 Then      '// If there is a duplicate exit sub
                        Exit Sub
                    End If
                Next J


                int_Tag_used(i) = 1                 '// set the tag as being used

                Panel_test.Controls.Add(Picture_Tag(i))
                Panel_test.Controls.Add(Label_Tag(i))

                int_Width = (Panel_test.Size.Width / 200)       '// new for 200

                Picture_Tag(i).Left = ((intStepNumber - 1) * int_Width) + 10
                Picture_Tag(i).Top = 0
                Picture_Tag(i).Visible = True

                Label_Tag(i).Left = ((intStepNumber - 1) * int_Width) + 5
                Label_Tag(i).Top = 20
                Label_Tag(i).Visible = True
                Label_Tag(i).Text = intStepNumber + 1     '// Add 1 to alight with trackbar value of 0 to 99

                int_Tag_Storage(i) = intStepNumber

                Exit For
            Else

                '// try next
            End If
        Next i
    End If

End Sub