winapi_04

#include <windows.h>
#include <stdio.h>


HINSTANCE hinst;

/* 函数声明　*/
int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int);
LRESULT CALLBACK MainWndProc(HWND, UINT, WPARAM, LPARAM);


//  功能显示一个窗口
int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow)
{
	WNDCLASSEX wcx;         //窗口类
	HWND hwnd;              //窗口句柄
	MSG msg;                //消息
	BOOL fGotMessage;        //是否成功获取信息
	hinst = hinstance;       //应用程序实例句柄，保存为全局变量     

	//填充窗口类的数据结构
	wcx.cbSize = sizeof(wcx);
	wcx.style = CS_HREDRAW | CS_VREDRAW;

	wcx.lpfnWndProc = MainWndProc;
	wcx.cbClsExtra=0;
	wcx.cbWndExtra = 0;
	wcx.hInstance = hinstance;
	wcx.hIcon = LoadIcon(NULL,IDI_APPLICATION);
	wcx.hCursor = LoadCursor(NULL,IDC_ARROW);

	wcx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);

	wcx.lpszMenuName = NULL;
	wcx.lpszClassName = "MainWClass";
	wcx.hIconSm = (HICON)LoadImage(hinstance, // 小图标
		MAKEINTRESOURCE(5),
		IMAGE_ICON,
		GetSystemMetrics(SM_CXSMICON),
		GetSystemMetrics(SM_CYSMICON),
		LR_DEFAULTCOLOR);
	
	// 注册窗口类
	if (!RegisterClassEx(&wcx))
	{
		return 1;
	}

	// 创建窗口 
	hwnd = CreateWindow(
		"MainWClass",        // 窗口名
		"CH 2-3",            // 窗口标题 
		WS_OVERLAPPEDWINDOW, // 窗口样式  
		CW_USEDEFAULT,       // 水平位置X：默认 
		CW_USEDEFAULT,       // 垂直位置Y：默认
		CW_USEDEFAULT,       // 宽度：默认
		CW_USEDEFAULT,       // 高度：默认 
		(HWND)NULL,         // 父窗口：无 
		(HMENU)NULL,        // 菜单：使用窗口类的菜单 
		hinstance,           // 应用程序实例句柄 
		(LPVOID)NULL);      // 窗口创建时数据：无 

	if (!hwnd)
	{
		return 1;
	}


	// 显示窗口 
	ShowWindow(hwnd, nCmdShow);
	UpdateWindow(hwnd);

	// 消息循环
	while (
		(fGotMessage = GetMessage(&msg, (HWND)NULL, 0, 0)) != 0
		&& fGotMessage != -1)
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;

	
	

}

//窗口消息处理函数
LRESULT CALLBACK MainWndProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
	switch (uMsg)
	{
	case WM_DESTROY:
		ExitThread(0);
		return 0;
	default:
		return DefWindowProc(hwnd, uMsg, wParam, lParam);
	}
}