vb 2015 GDI+ bitmap placement - vb.net

Question

I've had little luck trying to find the answer to this either on stackoverflow specifically, or on the internet in general.
I have a form in a vb 2015 Windows Forms project.
On that form, I've placed six controls: four textboxes, a panel, and a button.
When I click the button, it generates a bitmap, like so:
Private Sub btnSetLeft_Click(sender As Object, e As EventArgs) Handles btnSetLeft.Click
Dim R As Integer = CInt(txtRedLeft.Text)
Dim G As Integer = CInt(txtGreenLeft.Text)
Dim B As Integer = CInt(txtBlueLeft.Text)
Dim A As Integer = CInt(txtAlphaLeft.Text)
gcL = Color.FromArgb(A, R, G, B)
Using bm As Bitmap = New Bitmap(9, 9)
Using gBM As Graphics = Graphics.FromImage(bm)
Using br As SolidBrush = New SolidBrush(gcL)
gBM.FillRectangle(br, New Rectangle(0, 0, 8, 8))
End Using
End Using
End Using
End Sub
But, after building the bitmap, I want the button to place the bitmap on the panel and then repaint the panel, thus displaying the new bitmap.
How do I do that?

Answer 1

It's not too hard (I simplified your example):
Dim gcL As Color = Color.Blue
Using bm As New Bitmap(9, 9)
Using gBM As Graphics = Graphics.FromImage(bm)
Using br As New SolidBrush(gcL)
gBM.FillRectangle(br, New Rectangle(0, 0, 8, 8))
End Using
End Using
panel1.BackgroundImage = bm
panel1.BackgroundImageLayout = ImageLayout.Tile
panel1.Update()
End Using