Проблема с выводом графики

class Gmainsprite   
{
public:
    Graphics::TBitmap * mainsprite;
    
  void __fastcall DrawMainSprite()
    {
     mainsprite->LoadFromFile("E:/sprite0.bmp");
            BitBlt(gameform->Canvas->Handle, 200, 200, 40, 40, mainsprite->Canvas->Handle,0,0, SRCCOPY);
    };
 
private:
 
protected:};

#include "Unit1.h"
#include "Ggame.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
 
Gmainsprite * m_sprite=new Gmainsprite;
Tgameform * gameform;
//---------------------------------------------------------------------------
__fastcall Tgameform::Tgameform(TComponent* Owner)
    : TForm(Owner)
{
     m_sprite->DrawMainSprite();
}
//---------------------------------------------------------------------------

#include <vcl.h>
#include "Unit1.h"
 
class Gmainsprite   
{
public:
    Graphics::TBitmap * mainsprite;
 
    void __fastcall DrawMainSprite()
    {
         mainsprite->Canvas->LineTo(40, 30);
         BitBlt(gameform->Canvas->Handle, 200, 200, 40, 40, mainsprite->Canvas->Handle,0,0, SRCCOPY);
    }
private:
protected:
};