How to Reduce Process Memory? *Solved*

Hey, I've been trying to make a game using pure VB, and obviously one must use many graphics objects. This is just test code, but still, when I debug the program, the memory still goes up to 600-700MB. Graphics objects are created and used very fast as you can see. How can I reduce this? Do I need to dispose of them after being used?

Thanks!

~Nic

vb Code:

Public Class Form1
 
    Dim DefaultImg As New Bitmap(My.Resources.TestImg)
    Dim T1 As New Timer() With {.Interval = 10, .Enabled = True}
 
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        DoubleBuffered = True
        AddHandler T1.Tick, AddressOf T1_Tick
    End Sub
 
    Private Function LotOfCode() As Bitmap
        Dim Bmp As New Bitmap(800, 600)
        Dim G As Graphics = Graphics.FromImage(Bmp)
        G.DrawImage(DefaultImg, -5, -5)
        G.FillRectangle(Brushes.Red, 5, 5, 15, 15)
        Return Bmp
    End Function
 
    Private Sub T1_Tick()
        Invalidate()
    End Sub
 
    Private Sub Form1_Paint(sender As Object, e As PaintEventArgs) Handles Me.Paint
        e.Graphics.InterpolationMode = Drawing2D.InterpolationMode.NearestNeighbor
        Dim TestImg As Bitmap = LotOfCode()
        Dim ImgPt As New Point(25, 25)
        e.Graphics.DrawImage(TestImg, ImgPt)
    End Sub
 
End Class

Here's some more info: My real game/program/thing actually gets up to 2 GB before it crashes. (That's the max limit for debugging, right?) And there's also a lot of math used repeatedly, but I wouldn't expect that to be a problem. I just read about the "Using" statement, so I tried it out in my test program but it didn't change anything, unless I did it wrong. Is it common, or even preferred to use Graphics in a "Using" block?

Thanks.

Solution:
Put all the code into Form1_Paint's sub procedure. It speeds up the app by a lot, plus it doesn't use much memory. I'm not sure why.

Whatever caused it is in your real code, that example doesn't have anything that should cause additional memory usage or slowdown. It's likely there's some difference between your example and the real code that didn't show through.