#include <iostream>
#include <Windows.h>
#include <time.h>
#include <Windowsx.h>
HWND Edit;
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
POINT start;

int max = 500, current = 10;
int randx, randy, randz;

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
	srand(time(0));

	HWND Main;
	MSG msg;

	WNDCLASSEX wc;

	char szClassName[] = "AppClass";

	wc.style = 0;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hIcon = 0;
	wc.hCursor = 0;
	wc.hbrBackground = 0;
	wc.lpszMenuName = NULL;
	wc.hIconSm = 0;

	wc.cbSize = sizeof(wc);
	wc.lpszClassName = szClassName;
	wc.hInstance = hInstance;
	wc.lpfnWndProc = WndProc;

	if (!RegisterClassEx(&wc)) {
		MessageBox(NULL, "Не удалось зарегистрировать класс окна", "Ошибка", MB_OK);
		return 0;
	}

	Main = CreateWindow(szClassName, "dsg", DS_CENTER | WS_MAXIMIZEBOX | WS_SYSMENU, CW_USEDEFAULT, 0, 700, 700, 0, 0, hInstance, 0);

	ShowWindow(Main, nCmdShow);

	while (GetMessage(&msg, NULL, 0, 0)) {
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

	return 1;
}


LRESULT CALLBACK WndProc(HWND hDlg, UINT Msg, WPARAM wParam, LPARAM lParam) {
	HDC hdc;

	switch (Msg) {
	case WM_CREATE: {
		break;
	}
	case WM_PAINT: {
		hdc = GetDC(hDlg);

		MoveToEx(hdc, 0, 350, 0);
		LineTo(hdc, 700, 350);

		MoveToEx(hdc, 350, 0, 0);
		LineTo(hdc, 350, 700);

		double fDot = -1;

		for (int x = -5; x <= 5; x += 1) {
			double fY = cos(x);
			fY = 350 - fY * 30;
			if (fDot == -1)
			{
				fDot = fY;
				continue;
			}
			int cX = x * 30 + 350;

			MoveToEx(hdc, cX - 30, fDot, 0);
			LineTo(hdc, cX, fY);

			fDot = fY;
		}

		break;
	}
	case WM_CLOSE: {
		DestroyWindow(hDlg);
		break;
	}
	case WM_DESTROY: {
		PostQuitMessage(0);
		break;
	}
	default: {
		return DefWindowProc(hDlg, Msg, wParam, lParam); //обработка сообщений по умолчанию
	}
	}
	return 1;
}