Как это возможно сделать?

#include "windows.h"
#define _USE_MATH_DEFINES
#include <cmath>
#define WMAIN_CLASSNAME     "MyClassName"
#define WMAIN_CAPTION       "MyWindowName"
 
 
#define CIRCLE_CX                   150.0
#define CIRCLE_CY                   150.0
#define CIRCLE_BIG_RADIUS       100.0
#define CIRCLE_SMALL_RADIUS 40.0
#define ANGLE_COUNT             5
 
 
LRESULT CALLBACK WndProc(HWND hWnd,UINT message,WPARAM wParam, LPARAM lParam);
 
 
int CALLBACK WinMain(HINSTANCE hInst,HINSTANCE hPrev,LPTSTR cmd,int md)
{
    HWND hWnd;
    MSG msg;
    WNDCLASS wc;
    wc.cbClsExtra=0;
    wc.cbWndExtra=0;
    wc.hbrBackground=(HBRUSH)(COLOR_WINDOW+1);
    wc.hCursor=LoadCursor(NULL,IDC_ARROW);
    wc.hIcon=LoadIcon(NULL,IDI_WINLOGO);
    wc.hInstance=hInst;
    wc.lpfnWndProc=WndProc;
    wc.style=CS_HREDRAW | CS_VREDRAW;
    wc.lpszClassName=WMAIN_CLASSNAME;
    wc.lpszMenuName=NULL;
 
    if(!RegisterClass(&wc))
        return 0;
 
    hWnd=CreateWindow(WMAIN_CLASSNAME,WMAIN_CAPTION,/*WS_OVERLAPPEDWINDOW*/WS_OVERLAPPED|WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX|WS_MAXIMIZEBOX | WS_VISIBLE,CW_USEDEFAULT,CW_USEDEFAULT,500,300,HWND_DESKTOP,NULL,hInst,0);
 
    if (!hWnd)
        return 0;
 
    while(GetMessage(&msg,NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return 0;
}
 
 
LRESULT CALLBACK WndProc(HWND hWnd,UINT message,WPARAM wParam, LPARAM lParam)
{
    PAINTSTRUCT ps;
    HDC hdc;
    switch (message)
    {
    case WM_SIZE:
        InvalidateRect(hWnd,NULL,true);
        break;
    case WM_PAINT:{//Собственно само рисование:
        hdc = BeginPaint(hWnd, &ps);
        POINT oldpoint;
        HPEN hPen=CreatePen(PS_SOLID,1,RGB(255,0,0)),hOldPen;
        HBRUSH hBrush=CreateSolidBrush(RGB(0,0,255)),hOldBrush;
        hOldBrush=(HBRUSH)SelectObject(hdc,hBrush);
        hOldPen=(HPEN)SelectObject(hdc,hPen);
 
        double shift=360.0/ANGLE_COUNT;
        double dbshift=shift/2.0;
        double x=-180.0;
        MoveToEx(hdc,CIRCLE_CX+CIRCLE_BIG_RADIUS*sin(double(x*M_PI)/180.0),CIRCLE_CY+CIRCLE_BIG_RADIUS*cos(double(x*M_PI)/180.0),&oldpoint);
        for(;x<=180.0;x+=shift){
            LineTo(hdc,CIRCLE_CX+CIRCLE_BIG_RADIUS*sin(double(x*M_PI)/180.0),CIRCLE_CY+CIRCLE_BIG_RADIUS*cos(double(x*M_PI)/180.0));
            LineTo(hdc,CIRCLE_CX+CIRCLE_SMALL_RADIUS*sin(double((x+dbshift)*M_PI)/180.0),CIRCLE_CY+CIRCLE_SMALL_RADIUS*cos(double((x+dbshift)*M_PI)/180.0));
        }
        ExtFloodFill(hdc,CIRCLE_CX,CIRCLE_CY,RGB(255,0,0),FLOODFILLBORDER);
        MoveToEx(hdc,oldpoint.x,oldpoint.y,&oldpoint);
        SelectObject(hdc,hOldPen);
        DeleteObject(hPen);
        SelectObject(hdc,hOldBrush);
        DeleteObject(hBrush);
        EndPaint(hWnd,&ps);
        break;
                      }
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default: 
        return DefWindowProc(hWnd,message,wParam,lParam);
    }
    return 0;
}