孙鑫 Lesson1 window

最新推荐文章于 2018-10-21 22:54:58 发布

原创最新推荐文章于 2018-10-21 22:54:58 发布 · 237 阅读

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CC 4.0 BY-SA版权

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#窗口 #WNDCLASS #RegisterClass

本文介绍了一个使用C++在Windows平台上创建简单窗口应用程序的例子。通过详细展示WinMain函数及窗口过程函数WinSunProc的实现，读者可以了解到如何响应各种窗口消息如字符输入、鼠标点击等，并进行基本的绘图操作。

#include <Windows.h>
#include <stdio.h>

LRESULT CALLBACK WinSunProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
);

int WINAPI WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
)
{

//设计窗口
WNDCLASS wndcls;
wndcls.cbClsExtra=0;
wndcls.cbWndExtra=0;
wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
wndcls.hInstance=hInstance;
wndcls.lpfnWndProc=WinSunProc;
wndcls.lpszClassName="Test2016";
wndcls.lpszMenuName=NULL;
wndcls.style=CS_HREDRAW | CS_VREDRAW;
RegisterClass(&wndcls); //注册窗口

//创建窗口、显示窗口、更新窗口
HWND hwnd;
hwnd=CreateWindow("Test2016","Test C++'s window",WS_OVERLAPPEDWINDOW,0,0,600,400,NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
UpdateWindow(hwnd);

MSG msg;
while(GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg); //翻译消息
DispatchMessage(&msg); //分配消息
}
return 0;
}

//窗口回调函数
LRESULT CALLBACK WinSunProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
)
{
switch(uMsg)
{
case WM_CHAR:
char szChar[20];
sprintf(szChar,"char is %d",wParam);
MessageBox(hwnd,szChar,"Test",0);
break;
case WM_LBUTTONDOWN:
MessageBox(hwnd,"mouse clicked","Test",0);
HDC hdc;
hdc=GetDC(hwnd);
TextOut(hdc,0,50,"计算机编程语言C++",strlen("计算机编程语言C++"));
ReleaseDC(hwnd,hdc);
break;
case WM_PAINT:
HDC hDc;
PAINTSTRUCT ps;
hDc=BeginPaint(hwnd,&ps);
TextOut(hDc,0,0,"testA",strlen("testA"));
EndPaint(hwnd,&ps);
break;
case WM_CLOSE:
if(IDYES==MessageBox(hwnd,"是否真的结束？","Test",0))
{
DestroyWindow(hwnd);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}

LPCTSTR，其中T为宏	宏定义，用_T可以保证从ascii编码类型转换到unicode编码类型的时候，程序不需要修改, 用_T来保证兼容性
Fn=function、L=long、  W=WORD、 H=handle、 U=unsign
C=const ptr=pointer  P=pointer cb=count of bytes
Sz=string terminate by 0、 n=number	Abbreviation
LONG_PTR	表示32位与64环境下都兼容，32位下4个字节，64位环境下8个字节