Visual Basic (System Stack Overflow Exception)

Question

Hi everyone.

I am trying to code my own Space Invaders program for my college course. I am working on this tutorial on YouTube. Link provided here: https://www.youtube.com/watch?v=SsI2GVO1Hxs

I have gotten to about 12:00 on the video. As soon as I try to run the code to get my aliens to run right across the screen it doesnt happen and i just get the:
"System.StackOverflow exception. 'Exception of type system.stackoverflow exception was thrown. ?

I will paste my code on here so everyone can see it. I have pretty much copied the tutorial word for word up until this point so i dont know where i have gone wrong. Bear in mind i am only an absolute beginner so I dont know much at the moment. Still learning. Please help :(

Public Class Form1
#Region "Variables"
Dim Aliens(18) As PictureBox

Dim Lef As Boolean
Dim Rig As Boolean
Dim movealien As Integer = 3

#End Region

Region "Buttons"
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles StartGame.Click
StartGame.Hide()
QuitGame.Hide()
Panel1.Show()
Movecomp.Enabled = True
Movecomp.Start()
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles QuitGame.Click

End Sub
#End Region

#Region "Timers"
Private Sub Movecomp_Tick(sender As Object, e As EventArgs) Handles Movecomp.Tick
If Lef = True Then
MotherShip.Left = MotherShip.Left - 2
End If
If Rig = True Then
MotherShip.Left = MotherShip.Left + 2
End If
movealiens()
End Sub
#End Region

Private Sub Label2_Click(sender As Object, e As EventArgs)

End Sub

Private Sub MotherShip_Click(sender As Object, e As EventArgs) Handles MotherShip.Click

End Sub

Region "keypresses"
Private Sub movecompleft(sender As Object, e As KeyEventArgs) Handles MyBase.KeyDown
If e.KeyValue = Keys.A Then
Lef = True
End If
If e.KeyValue = Keys.D

Answer 1

As a general rule, a stack overflow exception is caused by a recursive algorithm where the depth of recursion has exceeded the (typically) fixed stack limit. This is usually a result of a bug in the algorithm, but it may also be caused by the data structure you are applying the algorithm to being too "deep".

https://stackoverflow.com/questions/1450192/what-is-a-stackoverflow-exception-in-vb-net

Answer 2

The youtube link, is a link to the tutorial i am following

Answer 3

https://code.sololearn.com/#html

Is this how i do it ?

Answer 4

https://code.sololearn.com/WpMIkSB1NcK4/#

Does this work ?

Answer 5

The error message indicates that you are entering an infinite recursion.

1. Illustrating infinite recursion with JavaScript

https://code.sololearn.com/W5w1SN6LS9Q0/?ref=app

2. Visual Basic documentation at Microsoft Docs
https://docs.microsoft.com/en-us/dotnet/visual-basic/

It is better to learn "Hello World" before coding a game.

3. Stop learning visual basic

You are following a 2014 tutorial.

Nowadays Microsoft uses C# instead of Visual Basic.

So I suggest you to learn C# with WPF framework instead.

C# documentation at Microsoft Docs
https://docs.microsoft.com/en-us/dotnet/csharp/

WPF documentation at Microsoft Docs
https://docs.microsoft.com/en-us/dotnet/framework/wpf/

C# Tic Tac Toe Game Tutorial
https://youtu.be/mnTyiUAHuVk

C# Racing Game Tutorial
https://youtu.be/xyggRDkoOwU

Answer 6

Hi there. Thank you for your reply. But my college course is requiring me to use this VB IDE to complete it. Do you know how I can solve this problem. I am just trying to get this out of the way so i can finish my course and start learning Java lol

Answer 7

I don't have VB IDE to debug.

Does the error message tell you which line the error occurs?

Bed time here. In case nobody relay answering this thread, I'll be back about 8 hours later.

Answer 8

Gordon. Did you see my link which takes you to the code on the Playground ?

Answer 9

Hi can you share your code with me?
[e-mail]