Работа с нитью

Graphics::TBitmap *pImage = new Graphics::TBitmap();
pImage->LoadFromFile("34.bmp");
Form1->Image1->Canvas->Draw(0,0,pImage);

First chance exception at $7C812AEB. Exception class EAccessViolation with message 'Access violation at address 501624B8 in module 'vcl120.bpl'. Read of address 000001A8'. Process Project1.exe (4052)

Form1->Image1->Canvas->Lock();
// дальнейшие действия по внесению изменений в канву объекта
Form1->Image1->Canvas->Unlock();

void __fastcall MovieThread::Execute()
{
Graphics::TBitmap* map=new Graphics::TBitmap();
Graphics::TBitmap* map2=new Graphics::TBitmap();
map2->Width = 500;
map2->Height = 500;
map->LoadFromFile("witcher.bmp");
 
while (/*!Terminated*/1)
{
 Sleep(10);
 Form1->Image1->Canvas->Lock();
 
 map2->Canvas->FillRect(Rect(0,0,500,500));
     RotateDC(map2->Canvas->Handle,angle0);
     SetViewportOrgEx(map2->Canvas->Handle,x,y,NULL);
     map2->Canvas->Draw(-150,-150,map);
     SetViewportOrgEx(map2->Canvas->Handle,0,0,NULL);
     RotateDC(map2->Canvas->Handle,0);
 Form1->Image1->Canvas->Draw(0,0,map2);
 Form1->Image1->Canvas->Unlock();
 
 x+=1;
 y+=1;
 angle0 +=10;
};
}
 
 
 
void RotateDC(HANDLE dc,float angle)
{
XFORM xform;
 
angle = angle * 3.1416 / 180.0;
 
xform.eDx = 0.0f;
xform.eDy = 0.0f;
xform.eM11 = cos(angle);
xform.eM12 = sin(angle);
xform.eM21 = -sin(angle);
xform.eM22 = cos(angle);
 
SetGraphicsMode(dc, GM_ADVANCED);
SetWorldTransform(dc, &xform);
}

First chance exception at $7C812AEB. Exception class EAccessViolation with message 'Access violation at address 501624B8 in module 'vcl120.bpl'. Read of address 000001A8'. Process Project1.exe (2532)