Read/Compile vb.net code dynamically from text file - vb.net

Question

I am trying to read and compile code from a text file. I have done some of its portion but feeling difficulties when trying to add controls to the Form. Kindly guide me. I am attaching code.
Public Class Form1
Sub Execute()
' Creates object of the compiler
Dim objCodeCompiler As System.CodeDom.Compiler.ICodeCompiler = New VBCodeProvider().CreateCompiler
'References/Parameters.
Dim objCompilerParameters As New System.CodeDom.Compiler.CompilerParameters()
objCompilerParameters.ReferencedAssemblies.Add("System.dll")
objCompilerParameters.ReferencedAssemblies.Add("System.Windows.Forms.dll")
objCompilerParameters.ReferencedAssemblies.Add("Microsoft.VisualBasic.dll")
'Compiles in memory.
objCompilerParameters.GenerateInMemory = True
'Runs the source code.
'You can use resources, textbox's or even the settings, up to you! :D
'Dim strCode As String = TextBox1.Text
'Compiler Results
'Dim objCompileResults As System.CodeDom.Compiler.CompilerResults = objCodeCompiler.CompileAssemblyFromSource(objCompilerParameters, strCode)
Dim objCompileResults As System.CodeDom.Compiler.CompilerResults = objCodeCompiler.CompileAssemblyFromFile(objCompilerParameters, "H:\VB project\LE21 - CodeDom - Run code from Textbox\LE21 - CodeDom - Run code from Textbox\LE21 - CodeDom - Run code from Textbox\file.txt")
'If an Error occurs
If objCompileResults.Errors.HasErrors Then
MsgBox("Error: Line>" & objCompileResults.Errors(0).Line.ToString & ", " & objCompileResults.Errors(0).ErrorText)
Exit Sub
End If
'Creates assembly
Dim objAssembly As System.Reflection.Assembly = objCompileResults.CompiledAssembly
Dim objTheClass As Object = objAssembly.CreateInstance("MainClass")
If objTheClass Is Nothing Then
MsgBox("Can't load class...")
Exit Sub
End If
'Trys to excute
Try
objTheClass.GetType.InvokeMember("ExecuteCode",
System.Reflection.BindingFlags.InvokeMethod, Nothing, objTheClass, Nothing)
Catch ex As Exception
MsgBox("Error:" & ex.Message)
End Try
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Runs the source code from textbox1.
Execute()
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim p As New Form2
p.Text = "hahahahah"
p.Show()
End Sub
End Class

Answer 1

"Type Form2 is not defined"
That's because you haven't defined it. You may be dynamically loading and compiling some file which contains code which does define it. But the compiler has no way of knowing that at compile time. Being a statically typed system, the compiler needs to know about all of the types you're using when it compiles the code.
If you're dynamically loading class definitions from a file, then you also need to dynamically invoke those class definitions. That's going to involve a lot of reflection and CodeDOM and whatnot. It's not going to be pretty, and it's definitely not going to have compile-time type checking. (And it's going to be very "stringly typed" in the sense that instead of creating an instance of Form2 you're going to be requesting from reflection to create an instance of "Form2" and hoping for the best.) So you're going to want to put in a lot of error handling for things like, for example, classes which don't exist.