case WM_MOUSEMOVE:
		if(wParam == MK_LBUTTON)
		{
			DrawMousePointer(hWnd,LOWORD(lParam), HIWORD(lParam));
		}
		break;

	
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;


	case WM_CLOSE: 
		if(MessageBox(hWnd, "Chcete ukoncit aplikaci?","WinHello", MB_YESNO | MB_ICONQUESTION)==IDYES)
		{
		PostQuitMessage(0);
		}
		return 0;
		
	}

	return DefWindowProc(hWnd, message, wParam, lParam);
}


void DrawWndContent (HWND hWnd,HDC hDc)
{
	RECT wrct;
	SIZE tsize;
	COLORREF zelena = RGB(0,255,0);
	HBRUSH stetec, stary_stetec;

	//vytvoreni noveho stetce
	stetec = CreateSolidBrush(zelena);


	// zjisteni velikosti okna
	GetClientRect(hWnd, &wrct);

	// zjisteni velikosti textu
	GetTextExtentPoint32(hDc, szText, strlen(szText),&tsize);
	
	// priradime  novy stetec do kontextu zarizeni
	stary_stetec = (HBRUSH)SelectObject(hDc,stetec);


	//zaramovani textu
	Rectangle (hDc, wrct.right/2-tsize.cx/2-5,wrct.bottom/2 - tsize.cy/2-5,
		wrct.right/2+tsize.cx/2 + 5,wrct.bottom/2+tsize.cy/2 +5 );

	//nastaveni pozadi textu
	SetBkColor(hDc,zelena);

	// nastaveni modu pozadi textu s pruhlednzm pozadim - transparant
	SetBkMode(hDc, TRANSPARENT);


	//tisk textu do okna
	TextOut(hDc, wrct.right/2-tsize.cx/2,
		wrct.bottom/2 - tsize.cy/2,
		szText, strlen(szText));
		
	// vraceni stareho stetce do kontextu zarizeni
	SelectObject(hDc,stary_stetec);

	// smazani objektu noveho stetce
	DeleteObject(stetec);
       
}


void DrawMousePointer(HWND hWnd, int x,int y)
{
	// ziskat kontext zarizeni
	HDC hDc = GetDC(hWnd);

    Ellipse(hDc,x -10,y-10,x+10,y+10);

	// uvolneni kontextu zarizeni
	ReleaseDC(hWnd, hDc);
}


void SetDefalut(HWND hWnd)
{
	HMENU hMenu;
	
	hMenu = GetMenu(hWnd);
			
	CheckMenuItem(hMenu, ID_DEFALUT, MF_CHECKED);
	CheckMenuItem(hMenu, ID_RED, MF_UNCHECKED);
	CheckMenuItem(hMenu, ID_GREEN, MF_UNCHECKED);

	ColorR=100;
	ColorG=100;
	ColorB=255;

	InvalidateRect(hWnd, NULL, TRUE);

}