Unloading a Module before calling it again.

In the Code examples below I call a module called Compile with a function called Compile. In that module you will see that I define a new form called Errorfrm as new Form3. If I click the meun button once and the errorfrm pops up and displays an error. I then close the newly displayed form and click the menu item again and I get an error in the module compile in the function compile when I try to display the errorfrm. So my question is, Do I have to unload the module or something so I do not get an error?

[code]
Private Sub MenuItem6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem6.Click
Compile.Compile(Code)
End Sub
[\code]

[code]
Module Compile
Dim Errorfrm As New Form3

Public Function Compile(ByVal Code As RichTextBox


' SHOW THE ERROR FORM INCASE THERE IS AN ERROR
Errorfrm.Show() ' THE SECOND TIME I RUN THIS FUNCTION THIS IS WHERE I GET THE ERROR. THE FIRST TIME EVERYTHING RUNS FINE

' CHECK TO SEE IF THERE ARE ANY LINES IN THE CODE
' IF NOT REPORT A MAJOR ERROR AND EXIT
If (Code_Length = 0) Then
' ADD THE ERROR TO THE LIST
Errorfrm.Errorlst.Items.Add("Line 0 - Error Code 1 - Major error, no code to be compiled")
' SINCE IT IS A MAJOR ERROR, NOTHING TO COMPILE
' EXIT THE FUNCTION AND RETURN CONTROL BACK TO THE CALLING FUNCTION
Exit Function
End If

End Function
End Module
[\code]

Why use a module at all? I would switch it to a shared class instead but either way there is no reason to have the instance of form3 to be created at that scope. You can have the compile function create the instance and solve the problem.

VB Code:

Module Compile
 
 
Public Function Compile(ByVal Code As RichTextBox
 
[b]Dim Errorfrm As New Form3[/b] 'inside the method call
' SHOW THE ERROR FORM INCASE THERE IS AN ERROR
Errorfrm.Show() ' THE SECOND TIME I RUN THIS FUNCTION THIS IS WHERE I GET THE ERROR. THE FIRST TIME EVERYTHING RUNS FINE
 
' CHECK TO SEE IF THERE ARE ANY LINES IN THE CODE
' IF NOT REPORT A MAJOR ERROR AND EXIT
If (Code_Length = 0) Then
' ADD THE ERROR TO THE LIST
Errorfrm.Errorlst.Items.Add("Line 0 - Error Code 1 - Major error, no code to be compiled")
' SINCE IT IS A MAJOR ERROR, NOTHING TO COMPILE
' EXIT THE FUNCTION AND RETURN CONTROL BACK TO THE CALLING FUNCTION
Exit Function
End If
 
End Function
End Module

I was going to do that but when my code hits the exit function statment, it will or should (I think) close the errorfrm that was created inside the compile function. And I need the errorfrm to stay open so the user can see his mistakes and fix them.

You should read up on OOP Object Oriented Programming. I started to convert your function for you but there are values that must come from some global values elsewhere because it doesn't make sense. Or maybe you just didn't post all of the code. Try using Showdialog instead of show to keep the form active.

For instance where is CODE_LENGTH declared or where does the value come from?

Try this:

VB Code:

Class Compile
 
Public Shared Sub Compile(ByVal Code As RichTextBox)
 
If Code.Text.Length=0 then
   Dim Errorfrm As New Form3
   Errorfrm.Errorlst.Items.Add("Line 0 - Error Code 1 - Major error, no code to be compiled")
   Errorfrm.ShowDialog()
End if
 
End Sub
 
End Class

Thanks, oop in c++ is easy, so this should be a snap, just never cared to use it. Mostly because all of my books are on vb6 and none talk about oop, so i did't know how. But I see what you are talking about. and Code_Length is a value that holds the length of a line of text in my rich text box, so i used a varible insted of doing len(code.line(X)) since a var is faster to access then a function. But thank you for your help.