Hello to every body. I want to make a DLL with a dynamic Form inside, this Form must contains a dynamic TButton and this one must have an OnClick event, dynamic too. How I can achieve that? I had created a dynamic Form with all mentioned before, but It comes from a clasic OnClick event from a Button inside a clasic Form, I mean, this Form clasic is not dynamic. This is my code: Code: //Unit1.cpp //--------------------------------------------------------------------------- #include <vcl.h> #pragma hdrstop #include "Unit1.h" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" TForm1 *Form1; TForm *MyDynamicForm; TButton *MyDynamicButton; //--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { } //--------------------------------------------------------------------------- void __fastcall TForm1::Button1Click(TObject *Sender) { MyDynamicForm = new TForm(Owner); MyDynamicForm->Height = 240; MyDynamicForm->Width = 480; MyDynamicForm->Caption = "My Dynamic Form"; MyDynamicButton = new TButton(MyDynamicForm); MyDynamicButton->Parent = MyDynamicForm; MyDynamicButton->Caption = "My Button"; MyDynamicButton->Left= 80; MyDynamicButton->Top = 30; MyDynamicButton->OnClick = MyFunction; MyDynamicForm->ShowModal(); } //--------------------------------------------------------------------------- void __fastcall TForm1::MyFucntion(TObject *Sender) { ShowMessage("This is a Dynamic OnClick Event"); } Code: //---------------------------------------------------------------------------- //Unit1.h //--------------------------------------------------------------------------- #ifndef Unit1H #define Unit1H //--------------------------------------------------------------------------- #include <Classes.hpp> #include <Controls.hpp> #include <StdCtrls.hpp> #include <Forms.hpp> //--------------------------------------------------------------------------- class TForm1 : public TForm { __published: // IDE-managed Components TButton *Button1; void __fastcall Button1Click(TObject *Sender); private: // User declarations public: // User declarations __fastcall TForm1(TComponent* Owner); void __fastcall MyFunction(TObject *Sender); }; //--------------------------------------------------------------------------- extern PACKAGE TForm1 *Form1; //--------------------------------------------------------------------------- #endif All before working perfectly. But if MyFunction not belong to a Form class,this event don't will work.Why?? Exist a way to achieve this?? Which one?? I was thinking that the event problem is that this one must belong to a Form Class, but my dll don't have one. So, how I can to build a Form class inside my dll? I know that a function definition inside a Dll is like this: extern "C" __declspec(dllexport) __fastcall void MyFunction(TObject *Sender); But that don't working when I try to use as an event. I mean: MyDynamicButton->OnClick = MyFunction; // but MyFunction is not a Form class member. How I can to convert MyFunction in an event and then use it in my dynamic button?? Thanks and sorry for my bad English, I am a Cuban. MÃchal