Changing Color of Simple Bitmaps

[NinthWaver]

If I load a bitmap let's say it has only two colors, white pixels on black pixels.

Dim myBitmap As Bitmap
myBitmap = Bitmap.FromFile("file.bmp")

Could I change the foreground white pixels to another color at runtime?

[.paul.]

you can change a color in a bitmap with image attributes:

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim img1 As New Bitmap(PictureBox2.Width, PictureBox2.Height)
        Dim att As System.Drawing.Imaging.ImageAttributes = New System.Drawing.Imaging.ImageAttributes
        Dim map(0) As System.Drawing.Imaging.ColorMap
        map(0) = New System.Drawing.Imaging.ColorMap
        map(0).OldColor = Color.White
        map(0).NewColor = Color.Red
        att.SetRemapTable(map)

        Dim gr As Graphics = Graphics.FromImage(img1)
        gr.DrawImage(PictureBox1.Image, New Point() {Point.Empty, New Point(img1.Width, 0), New Point(0, img1.Height)}, New Rectangle(Point.Empty, img1.Size), GraphicsUnit.Pixel, att)
        PictureBox2.Image = img1
    End Sub

End Class

[NinthWaver]

That looks perfect, thanks Paul

[TJTindal]

Thank you Paul, that code was precisely what I was looking for.