How do I switch blue and red pixels in color, not an image

[Winston17]

Using Visual Studio 2019, I want to make PictureBox1.BackColor Swap blue and red colors, I tried this

   Private Sub Button9_Click(sender As Object, e As EventArgs) Handles Button9.Click
        PictureBox1.BackColor.B = PictureBox1.BackColor.R
        PictureBox1.BackColor.G = PictureBox1.BackColor.G
        PictureBox1.BackColor.R = PictureBox1.BackColor.B
        PictureBox1.BackColor.A = PictureBox1.BackColor.A
    End Sub

and this

        Dim blue As Byte = PictureBox1.BackColor.R
        Dim green As Byte = PictureBox1.BackColor.G
        Dim red As Byte = PictureBox1.BackColor.B
        Dim alpha As Byte = PictureBox1.BackColor.A
        PictureBox1.BackColor.ToArgb(blue, green, red, alpha)

(Convert RGBA to BGRA or ARGB to ABGR)

How do I reorder ARGB? (Yellow may look Cyan, for example.)
I already got a negative effect. (Yellow may look Blue, for example.)

I can't find a working way of making RGB become BGR. I found some ways of doing it with images, but I wanted to do it with the color in the background of the tool.

[jmcilhinney]

You need to get the existing Color, create a new Color from that and then replace the existing Color with the new:

Dim currentColor = PictureBox1.BackColor
Dim newColor = Color.FromArgb(currentColor.A,
                              currentColor.B,
                              currentColor.G,
                              currentColor.R)
 
PictureBox1.BackColor = newColor

[Niya]

You could also do it like this:-

        Dim funcSwap = Function(c) Color.FromArgb(c.ToArgb And &HFF00FF00 Or c.R Or CInt(c.B) << 16)

        PictureBox1.BackColor = funcSwap(PictureBox1.BackColor)