Files

Polygon.cpp

#include <vcl.h>
#pragma hdrstop

#include "Polygon.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;

POINT Poligon1[2]  = {{50, 150}, {150, 20}};
POINT Poligon2[4]  = {{0,0}, {200, 200}, {100, 200}, {0,0}};
CONST POINT *pPoints1 = &Poligon1[0];
CONST POINT *pPoints2 = &Poligon2[0];

//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
    //Paint on the Form's Canvas Property
    //
    Canvas->Pen->Color = clRed;
    Polygon( Canvas->Handle, pPoints1, 2);  //Win32 API

    Canvas->Pen->Color = clBlue;
    Polygon( Canvas->Handle, pPoints2, 4);  //Win32 API
}
//---------------------------------------------------------------------------

void __fastcall TForm1::PaintBox1Paint(TObject *Sender)
{
    //Paint on the TPaintBox's Canvas Property
    //
    ((TPaintBox *)Sender)->Canvas->Pen->Color = clRed;
    Polygon( ((TPaintBox *)Sender)->Canvas->Handle, pPoints1, 2);  //Win32 API

    ((TPaintBox *)Sender)->Canvas->Pen->Color = clBlue;
    Polygon( ((TPaintBox *)Sender)->Canvas->Handle, pPoints2, 4);  //Win32 API
}
//---------------------------------------------------------------------------

Polygon.h

#ifndef PolygonH
#define PolygonH
//---------------------------------------------------------------------------
#include <Classes.hpp>
#include <Controls.hpp>
#include <StdCtrls.hpp>
#include <Forms.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:	// IDE-managed Components
        TButton *Button1;
        TPaintBox *PaintBox1;
        void __fastcall Button1Click(TObject *Sender);
        void __fastcall PaintBox1Paint(TObject *Sender);
private:	// User declarations
public:		// User declarations
        __fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif