c++学习笔记，windows窗口模版

记录一下模版

#include <Windows.h>

LRESULT CALLBACK myProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);

//程序入口
int WINAPI WinMain(
	HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	char * lpCmdLine,
	int nCmdShow) {

	WNDCLASS wnd = { 0 };
	wnd.cbClsExtra = 0;
	wnd.cbWndExtra = 0;
	wnd.hbrBackground = (HBRUSH)GetStockObject(WHITENESS);
	wnd.hCursor = LoadCursor(NULL, IDC_ARROW);
	wnd.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	wnd.hInstance = hInstance;
	wnd.lpfnWndProc = myProc;	//过程函数
	wnd.lpszClassName = "test";
	wnd.lpszMenuName = NULL;
	wnd.style = CS_VREDRAW | CS_HREDRAW;

	//注册窗口
	if (!RegisterClass(&wnd)) {
		MessageBox(NULL, "注册窗口失败", "error", MB_OK);
		return false;
	}
	float app_centerX = GetSystemMetrics(SM_CXSCREEN) / 2.0f;
	float app_centerY = GetSystemMetrics(SM_CYSCREEN) / 2.0f;
	float dm_width = 600;
	float dm_height = 800;
	//创建窗口
	HWND hwnd = CreateWindow(
		"test",
		"title",
		WS_OVERLAPPEDWINDOW,	//此处显示为没有标题栏和菜单栏 WS_VISIBLE | WS_POPUP
		app_centerX - dm_width / 2.0f,
		app_centerY - dm_height / 2.0f,
		static_cast<int>(dm_width),
		static_cast<int>(dm_height), NULL, NULL, hInstance, NULL);
	if (!hwnd) {
		MessageBox(NULL, "窗口创建失败", "error", MB_OK);
		return false;
	}
	//显示
	ShowWindow(hwnd, nCmdShow);

	//消息循环
	MSG msg;
	while (GetMessage(&msg, hwnd, 0, 0)) {
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

	return 0;
}

//过程函数
LRESULT CALLBACK myProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
	switch (message) {
	case  WM_CLOSE:
		if (MessageBox(hwnd, "确定退出游戏?", "msg", MB_OKCANCEL) == IDOK){
			PostQuitMessage(0);
			break;
		}
		return 0;
	case WM_DESTROY:
		exit(0);
		return 0;
	default:
		break;
	}

	return DefWindowProc(hwnd,message,wParam,lParam);
}