лаба 3 №3

#include <Windows.h>
#include <tchar.h>
#include <vector>
using namespace std;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
TCHAR WinName[] = _T("MainFrame");
int APIENTRY WinMain(HINSTANCE This, HINSTANCE Prev, LPSTR cmd, int mode)
{
    HWND hWnd;
    MSG msg;
    WNDCLASS wc;
    wc.hInstance = This;
    wc.lpszClassName = WinName;
    wc.lpfnWndProc = WndProc;
    wc.style = CS_HREDRAW;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.lpszMenuName = NULL;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    if (!RegisterClass(&wc))return 0;
    hWnd = CreateWindow(WinName,
        _T("каркас Windows приложения"),
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        HWND_DESKTOP,
        NULL,
        This,
        NULL);
    ShowWindow(hWnd, mode);
    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;
    static int sx, sy;
    static HPEN hpen;
    vector<POINT> v;
    switch (message)
    {
    case WM_SIZE: {
        sx = LOWORD(lParam);
        sy = HIWORD(lParam);
        break;
    }
    case WM_CREATE: {
        hpen = CreatePen(PS_SOLID, 2, RGB(0, 0, 255));

        v.push_back({ -100,100 });
        v.push_back({ -100,-100 });
        v.push_back({ 100,-100 });
        v.push_back({ 100,100 });
        v.push_back({ 150,100 });
        v.push_back({ 150,-100 });
        v.push_back({ 250,-100 });
        v.push_back({ 250,100 });

        break;
    }
    case WM_PAINT:{
        hdc = BeginPaint(hWnd, &ps);
        SelectObject(hdc, hpen);
        for (int i = 0; i < 3; i++) {
            LineTo(hdc, v[i].x, v[i].y);
            MoveToEx(hdc, v[i].x, v[i].y, NULL);
        }
            Ellipse(hdc, v[4].x, v[5].y, v[6].x, v[7].y);
        EndPaint(hWnd, &ps);
        break;
    }
    case WM_DESTROY: PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}