I don't want to worry about it anymore.

1 private void AddCode (Form form)
2 {
3 IDesignerHost host = null;
4 host = (IDesignerHost) form. Site. GetService (typeof (IDesignerHost ));
5
6 // Add method "Form1_Load" on Form1
7 //---------------------------------------------------------------------------
8 CodeMemberMethod member = new CodeMemberMethod ();
9 member. Name = "Form1_Load ";
10 member. Parameters. Add (new CodeParameterDeclarationExpression ("System. Object", "sender "));
11 member. Parameters. Add (new CodeParameterDeclarationExpression ("System. EventArgs", "e "));
12 CodeSnippetExpression sn;
13 sn = new CodeSnippetExpression ("MessageBox. Show (\" Hello world \")");
14 member. Statements. Add (sn );
15 member. Attributes = MemberAttributes. Private;
16 CodeTypeDeclaration typedecl = (CodeTypeDeclaration) form. Site. GetService (typeof (CodeTypeDeclaration ));
17 typedecl. Members. Add (member );
18 //---------------------------------------------------------------------------
19
20
21 // This code will add the following line to the "InitializeMethod" method
22 // this. Load + = new System. EventHandler (this. Form1_Load );
23 //---------------------------------------------------------------------------
24 member = new CodeMemberMethod ();
25 foreach (CodeTypeMember typememb in typedecl. Members)
26 {
27 if (typememb. Name = "InitializeComponent ")
28 {member = (CodeMemberMethod) typememb ;}
29}
30 CodeDelegateCreateExpression createDelegate1;
31 createDelegate1 = new CodeDelegateCreateExpression (new CodeTypeReference ("System. EventHandler"), new CodeThisReferenceExpression (), "formateload ");
32 CodeAttachEventStatement attach = new CodeAttachEventStatement (new CodeThisReferenceExpression (), "Load", createDelegate1 );
33 member. Statements. Add (attach );
34 typedecl. Members. Add (member );
35 //---------------------------------------------------------------------------
36
37
38 // Add and remove a label because otherwise the code to add the method seems to stay "inactive,
39 // while in this way it works
40 //---------------------------------------------------------------------------
41 Label lbl = (Label) host. CreateComponent (typeof (Label ));
42 host. DestroyComponent (lbl );
43 //---------------------------------------------------------------------------
44}