Win32专题1：入门一个简单的Win32程序

注册Window窗体类：RegisterClass

//定义窗口类
WNDCLASS wndClass;
//窗口类样式
wndClass.style = CS_HREDRAW | CS_VREDRAW;
//窗口过程函数
wndClass.lpfnWndProc = MyWndDef;
//窗口类无扩展
wndClass.cbClsExtra = 0;
//窗口实例无扩展
wndClass.cbWndExtra = 0;
//窗口所属实例句柄
wndClass.hInstance = hInstance;
//窗口最小化图标句柄
wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
//窗口光标样式句柄
wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
//窗口背景句柄 
wndClass.hbrBackground = (HBRUSH)(GetStockObject(WHITE_BRUSH));
//窗口类Menu名称
wndClass.lpszMenuName = NULL;
//窗口类的唯一名称
wndClass.lpszClassName = L"hello";
if (!RegisterClass(&wndClass)) {
    MessageBox(NULL, L"窗口类注册失败！", L"提示", MB_OK);
    return FALSE;
}

创建Window窗体句柄：CreateWindow

HWND hwnd = CreateWindow(L"hello",//窗口类名称
	L"第一个窗口程序",//窗口左上角的标题
	WS_OVERLAPPEDWINDOW,//窗口风格
	CW_USEDEFAULT,//窗口左上角坐标
	CW_USEDEFAULT,
	CW_USEDEFAULT,//窗口宽高
	CW_USEDEFAULT,
	NULL,//父窗口句柄 
	NULL,//窗口菜单句柄
	hInstance,//窗口所属实例句柄
	NULL
);

显示窗体和更新窗体

//显示窗口
ShowWindow(hwnd, nCmdShow);
//绘制用户区域
UpdateWindow(hwnd);

自定义窗口过程函数

LRESULT CALLBACK MyWndDef(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
	switch (message)
	{
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd, message, wParam, lParam);
	}
	return 0;
}

处理Window消息

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

完整代码

// TestWin.cpp : 定义应用程序的入口点。
//

#include <windows.h>
#include "TestWin.h"
LRESULT CALLBACK MyWndDef(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
	switch (message)
	{
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd, message, wParam, lParam);
	}
	return 0;
}
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
	_In_opt_ HINSTANCE hPrevInstance,
	_In_ LPWSTR    lpCmdLine,
	_In_ int       nCmdShow)
{
	//定义窗口类
	WNDCLASS wndClass;
	//窗口类样式
	wndClass.style = CS_HREDRAW | CS_VREDRAW;
	//窗口过程函数
	wndClass.lpfnWndProc = MyWndDef;
	//窗口类无扩展
	wndClass.cbClsExtra = 0;
	//窗口实例无扩展
	wndClass.cbWndExtra = 0;
	//窗口所属实例句柄
	wndClass.hInstance = hInstance;
	//窗口最小化图标句柄
	wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	//窗口光标样式句柄
	wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
	//窗口背景句柄 
	wndClass.hbrBackground = (HBRUSH)(GetStockObject(WHITE_BRUSH));
	//窗口类Menu名称
	wndClass.lpszMenuName = NULL;
	//窗口类的唯一名称
	wndClass.lpszClassName = L"hello";

	if (!RegisterClass(&wndClass)) {
		MessageBox(NULL, L"窗口类注册失败！", L"提示", MB_OK);
		return FALSE;
	}

	HWND hwnd = CreateWindow(L"hello",//窗口类名称
		L"第一个窗口程序",//窗口左上角的标题
		WS_OVERLAPPEDWINDOW,//窗口风格
		CW_USEDEFAULT,//窗口左上角坐标
		CW_USEDEFAULT,
		CW_USEDEFAULT,//窗口宽高
		CW_USEDEFAULT,
		NULL,//父窗口句柄 
		NULL,//窗口菜单句柄
		hInstance,//窗口所属实例句柄
		NULL
	);

	//显示窗口
	ShowWindow(hwnd, nCmdShow);
	//绘制用户区域
	UpdateWindow(hwnd);

	MSG msg;
	while (GetMessage(&msg, nullptr, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}