KG2

#include <Windows.h>
#include <tchar.h>
#include "stdafx.h"
#define _USE_MATH_DEFINES
#include <math.h>
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 | 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)(NULL);
    if (!RegisterClass(&wc)) return 0;

    hWnd = CreateWindow(WinName, _T("Каркас Windiws-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, f;
    static HPEN hpen1, hpen2, hpen3, hpen4, hpen5;
    static HBRUSH hbrush1;
    int a, b, x_scr, y_scr;
    double x, h;
    switch (message)
    {
    case WM_CREATE:

        hpen1 = CreatePen(PS_SOLID, 2, RGB(0, 0, 0));
        hpen2 = CreatePen(PS_SOLID, 2, RGB(255, 0, 0));
        hpen3 = CreatePen(PS_SOLID, 2, RGB(0, 255, 0));
        hpen4 = CreatePen(PS_SOLID, 2, RGB(0, 0, 255));
        hpen5 = CreatePen(PS_SOLID, 2, RGB(160, 30, 255));
        break;
    case WM_SIZE:
        sx = LOWORD(lParam);
        sy = HIWORD(lParam);
        break;
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps);
        SelectObject(hdc, hpen1);   //построение осей
        Ellipse(hdc, 100, 100, 150, 150);
        SelectObject(hdc, hpen2);
        Ellipse(hdc, 120, 125, 170, 175);
        SelectObject(hdc, hpen3);
        Ellipse(hdc, 80, 125, 130, 175);
        SelectObject(hdc, hpen4);
        //Ellipse(hdc, 90, 135, 150, 195);
        SelectObject(hdc, hpen5);
        //Ellipse(hdc, 100, 100, 150, 150);
        EndPaint(hWnd, &ps);
        break;
    case WM_DESTROY:
        DeleteObject(hpen1);
        DeleteObject(hpen2);
        DeleteObject(hpen3);
        DeleteObject(hpen4);
        DeleteObject(hpen5);
        PostQuitMessage(0);
        break;
    default: return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}