Рисование на канве, событие OnMouseMove

void __fastcall Tmf::FormCreate(TObject *Sender)
{
   int curr=0;
   for(int i=0;i<=8;i++)
   {
      curr=curr+i*10;
      bg->Canvas->MoveTo(0,curr);
      bg->Canvas->LineTo(320+curr*400/360,curr);
   }
 
   for(int i=0;i<=8;i++)
   {
      bg->Canvas->MoveTo(i*40,0);
      bg->Canvas->LineTo(i*90,360);
   }
}

//---------------------------------------------------------------------------
 
#include <vcl.h>
#pragma hdrstop
 
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
int x,y;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
        DoubleBuffered = true;
}
//---------------------------------------------------------------------------
 
 
 
void __fastcall TForm1::FormMouseMove(TObject *Sender, TShiftState Shift,
      int X, int Y)
{
        if ( X < 320 && Y < 320 )
        {
                Caption = String(abs(X/40)) +" : "+String(abs(Y/40));
                x = abs(X/40);
                y = abs(Y/40);
        }
        Repaint();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormPaint(TObject *Sender)
{
   Canvas->Pen->Color = clBlack;
   Canvas->Brush->Color = clWhite;
   for(int i = 0; i < 9; i++)
   {
      Canvas->MoveTo(0,i*40);
      Canvas->LineTo(320,i*40);
   }
 
   for(int i = 0; i < 9; i++)
   {
      Canvas->MoveTo(i*40,0);
      Canvas->LineTo(i*40,320);
   }
   //...
   Canvas->Pen->Color = clBlack;
   Canvas->Brush->Color = clRed;
   Canvas->Rectangle(x*40,y*40,x*40+41,y*40+41);
 
}
//---------------------------------------------------------------------------

Image1->Canvas->Brush->Color= clNewColor;
if (PtInRect(R,P)) Image1->Canvas->FillRect(R);