Не рисуется звездочка на форме

//---------------------------------------------------------------------------
 
#include <vcl.h>
#pragma hdrstop
#include <math.h>
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
void __fastcall TForm1::FormPaint(TObject *Sender)
{
  int r=30;
  int x=50, y=50;
  const float pi=3.1415926;
  Canvas->MoveTo(x + r, y);
  for(int i=1; i<=n; i++)
  {
 
  Canvas->LineTo(x + cos(i*m*pi*2/n) * r, y + sin(i*m*pi*2/n) * r);
  }
 }
//---------------------------------------------------------------------------
 
void __fastcall TForm1::FormCreate(TObject *Sender)
{
 
  n=5;
  m=2;
  Edit1->Text="5";
  Edit2->Text="2";
}
//---------------------------------------------------------------------------
 void __fastcall TForm1::Button1Click(TObject *Sender)
{
  n=StrToInt(Edit1->Text); //?????????? ?????
  m=StrToInt(Edit2->Text); //????? ??????? ?????????
  Invalidate();
}

//---------------------------------------------------------------------------
 
#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include <Classes.hpp>
#include <Controls.hpp>
#include <StdCtrls.hpp>
#include <Forms.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:    // IDE-managed Components
 
        void __fastcall  FormCreate(TObject *Sender);
        void __fastcall Button1Click(TObject *Sender);
        void __fastcall FormPaint(TObject *Sender);
 
private:
int n, m;
public:     // User declarations
__fastcall TForm1(TComponent* Owner);
      TEdit *Edit1;
      TEdit *Edit2;
       TButton *Button1;
 
        TLabel *Label1;
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif