#include <Windows.h>
#include "resource.h"
MSG msg;
HWND hWnd;
WNDCLASSEX wc;
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);


int CALLBACK wWinMain(HINSTANCE hInstance, HINSTANCE, PWSTR szCmdLine, int nCmdShow) {
	wc.cbSize = sizeof(WNDCLASSEX);
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wc.hInstance = hInstance;
	wc.hCursor = LoadCursor(wc.hInstance, IDC_ARROW);
	wc.hIcon = LoadIcon(wc.hInstance, IDI_ERROR);
	wc.hIconSm = LoadIcon(wc.hInstance, IDI_ERROR);
	wc.lpfnWndProc = (WNDPROC)WndProc;
	wc.lpszClassName = "Application";
	wc.lpszMenuName = MAKEINTRESOURCE(IDR_MENU1);
	wc.style = CS_VREDRAW | CS_HREDRAW;
	if (!RegisterClassEx(&wc))
		return EXIT_FAILURE;
	hWnd = CreateWindow(wc.lpszClassName, wc.lpszClassName, WS_OVERLAPPEDWINDOW, 0, 0, 1680, 1050, nullptr, nullptr, wc.hInstance, nullptr);
	if (hWnd == INVALID_HANDLE_VALUE)
		return EXIT_FAILURE;
	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);
	while (GetMessage(&msg, nullptr, 0, 0)) {
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
	switch (uMsg) {
	case WM_COMMAND:
		switch (LOWORD(wParam)) {
		case ID_CHANGE_CURSOR:
			SetClassLong(hWnd, GCL_HCURSOR, (LONG)LoadCursor(wc., IDC_CROSS));
		break;
		case ID_CHANGE_BACKGROUND:
			SetClassLong(hWnd, GCL_HBRBACKGROUND, (LONG)CreateSolidBrush(RGB(0, 0, 255)));
			InvalidateRect(hWnd, nullptr, TRUE);
			break;
		}
		break;
		case WM_DESTROY:
			PostQuitMessage(EXIT_SUCCESS);
			break;
	}
	return DefWindowProc(hWnd, uMsg, wParam, lParam);
}