lab3.3

#include "stdafx.h"
#include <vector>
#define _USE_MATH_DEFINES
#include <math.h>
#include <Windows.h>
#include <tchar.h>

using namespace std;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
TCHAR WinName[] = _T("MainFrame");

vector <int> shape;
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 | CS_VREDRAW;
    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 hpen1, hpen2;
    int elps(1), sqr(0);
    int a, b, x1(400), y1(400), x2(200), y2(200);
    switch (message) {
    case WM_CREATE:
        hpen1 = CreatePen(PS_SOLID, 2, RGB(0, 0, 255));
        hpen2 = CreatePen(PS_SOLID, 2, RGB(255, 0, 0));
        shape.push_back(sqr);
        shape.push_back(elps);
        break;
    case WM_SIZE:
        sx = LOWORD(lParam);
        sy = HIWORD(lParam);
        break;
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps);
        a = sx / 2;
        b = sy / 2;
        for (int i = 0; i < shape.size(); i++) {
            if (shape[i] == 0) {
                SelectObject(hdc, hpen1);
                Rectangle(hdc, x1, y1, x2, y2);
            }
            else {
                SelectObject(hdc, hpen2);
                Ellipse(hdc, x1, y1, x2, y2);
            }
        }
        EndPaint(hWnd, &ps);
        break;
    case WM_DESTROY:
        DeleteObject(hpen1);
        DeleteObject(hpen2);
        PostQuitMessage(0);
        break;
    default: return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}