[2005] graphics question

i got this floodfill code from the internet, but its too slow.

Code:

---

Public Sub FloodFill(ByVal bm As Bitmap, ByVal x As _
    Integer, ByVal y As Integer, ByVal new_color As Color)
        ' Get the old and new colors.
        Dim old_color As Color = bm.GetPixel(x, y)

        ' Start with the original point in the stack.
        Dim pts As New Stack(100)
        pts.Push(New Point(x, y))
        bm.SetPixel(x, y, new_color)

        ' While the stack is not empty, process a point.
        Do While pts.Count > 0
            Dim pt As Point = DirectCast(pts.Pop(), Point)
            If pt.X > 0 Then SafeCheckPoint(bm, pts, pt.X - 1, _
                pt.Y, old_color, new_color)
            If pt.Y > 0 Then SafeCheckPoint(bm, pts, pt.X, pt.Y _
                - 1, old_color, new_color)
            If pt.X < bm.Width - 1 Then SafeCheckPoint(bm, pts, _
                pt.X + 1, pt.Y, old_color, new_color)
            If pt.Y < bm.Height - 1 Then SafeCheckPoint(bm, _
                pts, pt.X, pt.Y + 1, old_color, new_color)
        Loop
    End Sub

    Private Sub SafeCheckPoint(ByVal bm As Bitmap, ByVal pts As _
        Stack, ByVal x As Integer, ByVal y As Integer, ByVal _
        old_color As Color, ByVal new_color As Color)
        Dim clr As Color = bm.GetPixel(x, y)
        If clr.Equals(old_color) Then
            pts.Push(New Point(x, y))
            bm.SetPixel(x, y, new_color)
        End If
    End Sub

---

does anyone know of a faster way to floodfill an area?

I'm not sure what you mean by "floodfill". Can you elaborate on what you are actually trying to do?

i'm trying to change a region of same colored pixels to a different color

Is your region restricted by a certain perimeter or does it apply to an entire bitmap..... or both?

its a paint program.
the region could be any shape, part or complete bitmap.

Either way, it is going to have to loop through all of the pixels in the region. If you want to speed it up a little, consolidate your code into a single method. You're losing speed by leaving the loop to process another method. Also, avoid creating variables for data that you already have, whenever possible.