Создаем простой отчет на С++ в FastReport 5.0 и выводим на печать.

Для Form1:

Unit1.cpp

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
#include "Unit2.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
	: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
TfrxReport *Report;
Report = Form2->frxReport1;
Report->Preview = Form2->frxPreview1;
Report->ShowReport();
Form2->WindowState=wsMaximized; //Размер по всему экрану
Form2->Show();
}

Unit1.h

#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include <System.Classes.hpp>
#include <Vcl.Controls.hpp>
#include <Vcl.StdCtrls.hpp>
#include <Vcl.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);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif

Для Form2:

Unit2.cpp

#include <vcl.h>
#pragma hdrstop

#include "Unit2.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma link "frxClass"
#pragma link "frxPreview"
#pragma resource "*.dfm"
TForm2 *Form2;
//---------------------------------------------------------------------------
__fastcall TForm2::TForm2(TComponent* Owner)
	: TForm(Owner)
{
}
//---------------------------------------------------------------------------



//---------------------------------------------------------------------------

void __fastcall TForm2::Button1Click(TObject *Sender)
{
frxPreview1->Print();
}

Unit2.h

#ifndef Unit2H
#define Unit2H
//---------------------------------------------------------------------------
#include <System.Classes.hpp>
#include <Vcl.Controls.hpp>
#include <Vcl.StdCtrls.hpp>
#include <Vcl.Forms.hpp>
#include "frxClass.hpp"
#include "frxPreview.hpp"
//---------------------------------------------------------------------------
class TForm2 : public TForm
{
__published:	// IDE-managed Components
	TfrxReport *frxReport1;
	TfrxPreview *frxPreview1;
	TButton *Button1;
	void __fastcall Button1Click(TObject *Sender);

private:	// User declarations
public:		// User declarations
	__fastcall TForm2(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm2 *Form2;
//---------------------------------------------------------------------------
#endif