#include <windows.h>
#include <stdio.h>
LRESULT CALLBACK WinSunProc(//名字可以更改。参数类型不能变
HWND hwnd, // handle to window 窗口句柄
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter 消息参数
LPARAM lParam // second message parameter
);
/*
int WINAPI WinMain(
HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // pointer to command line
int nCmdShow // show state of window
);
*/
int WINAPI WinMain(//Windows程序的入口函数
HINSTANCE hInstance, // handle to current instance 当前实例句柄
HINSTANCE hPrevInstance, // handle to previous instance 前次实例句柄
LPSTR lpCmdLine, // command line 命令行参数
int nCmdShow // show state 显示方式
)
{
/*
创建一个完整的窗口需要经过下面四个操作步骤:
1、设计一个窗口类;
2、注册窗口类;
3、创建窗口;
4、显示及更新窗口。
typedef struct _WNDCLASS {
UINT style; //类的类型
WNDPROClpfnWndProc; //longpointfunction函数指针
int cbClsExtra; //类的附加内存
int cbWndExtra; //窗口附加内存
HANDLE hInstance; //实例号(句柄)
HICON hIcon; //图标句柄
HCURSOR hCursor; //光标句柄
HBRUSH hbrBackground; //画刷句柄
LPCTSTR lpszMenuName; //菜单的名字
LPCTSTR lpszClassName; //类的名字
} WNDCLASS;
*/
//1、设计一个窗口类;
WNDCLASS wndcls;//窗口类
wndcls.style=CS_HREDRAW | CS_VREDRAW;//重画垂直方向、水平方向
wndcls.lpfnWndProc=WinSunProc;//函数地址
wndcls.cbClsExtra=0;//类的附加内存
wndcls.cbWndExtra=0;//窗口的附加内存
wndcls.hInstance=hInstance;//实例号
wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);//图标 设置
wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);//光标 设置
wndcls.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);//画刷的句柄
wndcls.lpszMenuName=NULL;//(菜单名字)
wndcls.lpszClassName="VCXTU";//注册类名(longpoint命令行参数)
//2、注册窗口类;
RegisterClass(&wndcls);//注册类
/*
HWND CreateWindow(
LPCTSTR lpClassName, // pointer to registered class name
LPCTSTR lpWindowName, // pointer to window name
DWORD dwStyle, // window style
int x, // horizontal position of window
int y, // vertical position of window
int nWidth, // window width
int nHeight, // window height
HWND hWndParent, // handle to parent or owner window
HMENU hMenu, // handle to menu or child-window identifier
HANDLE hInstance, // handle to application instance
LPVOID lpParam // pointer to window-creation data
);
*/
//3、创建窗口;
HWND hwnd;//窗口句柄
hwnd=CreateWindow(
"VCXTU",//注册类名(lpszClassName)
"湖南省湘潭市湘潭大学",//窗口名字
/*
WS_OVERLAPPEDWINDOW:
窗口风格
WS_OVERLAPPED 层叠的 具有标题栏和边框
WS_CAPTION 有标题栏
WS_SYSMENU 带有系统菜单
WS_THICKFRAME 具有可调边框
WS_MINIMIZEBOX 具有最小化按钮
WS_MAXIMIZEBOX) 具有最大化按钮
*/
WS_OVERLAPPEDWINDOW,//窗口风格
CW_USEDEFAULT,//窗口水平坐标(缺省的)
CW_USEDEFAULT,//窗口垂直坐标(缺省的)
600,//窗口宽度
400,//窗口高度
NULL,// 父窗口句柄(hWndParent/handle to parent or owner window)
NULL,// 菜单句柄(handle to menu or child-window identifier)
hInstance,//句柄(handle to application instance)
NULL//窗口参数(pointer to window-creation data)
);
/*
BOOL ShowWindow(
HWND hWnd, // handle to window
int nCmdShow // show state of window
);
*/
//4、显示及更新窗口。
ShowWindow(
hwnd,//窗口句柄
SW_SHOWNORMAL//显示状态 show state of window
);
UpdateWindow(hwnd);//可有可无
/*
操作系统将每个事件都包装成一个称为消息的结构体MSG来传递给应用程序
MSG结构定义如下:
typedef struct tagMSG {
HWND hwnd;
UINT message;
WPARAM wParam;
LPARAM lParam;
DWORD time;
POINT pt;
} MSG;
*/
//消息循环
MSG msg;
/*
BOOL GetMessage(
LPMSG lpMsg, // address of structure with message
HWND hWnd, // handle of window
UINT wMsgFilterMin, // first message
UINT wMsgFilterMax // last message
);
*/
while(
GetMessage(
&msg,
NULL,
0,//设成0。表示对所有消息都有兴趣
0
)
)
{
/*
转换消息。可以将WM_KEYUP/WM_KEYDOWN转换为WM_CHAR消息、产生新消息并放到队列中
BOOL TranslateMessage(
CONST MSG *lpMsg // address of structure with message
);
*/
TranslateMessage(&msg);
/*
将收到的消息传到窗口的回调函数:wndcls.lpfnWndProc=WinSunProc;回调函数:WinSunProc
LONG DispatchMessage(
CONST MSG *lpmsg // pointer to structure with message
);
*/
DispatchMessage(&msg);
}
return 0;
}
LRESULT CALLBACK WinSunProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
)
{
switch(uMsg)
{
case WM_CHAR://表示按下了某个字符按键
char szChar[20];
sprintf(szChar,"char is %d",wParam);//格式化消息。WM_CHAR中的wParam参数
/*
int MessageBox(
HWND hWnd, //拥有消息的父窗口 handle of owner window
LPCTSTR lpText, //文本 address of text in message box
LPCTSTR lpCaption, //标题 address of title of message box
UINT uType //消息框的风格 style of message box
);
*/
MessageBox(
hwnd,
szChar,
"湘潭大学",//标题
MB_OKCANCEL//MB_YESNO//消息框的风格
);
break;
case WM_LBUTTONDOWN:
MessageBox(hwnd,"鼠标左键点击了","湘潭大学",MB_OKCANCEL);
HDC hdc;//句柄 handle to device context
/*
HDC GetDC(
HWND hWnd // handle to a window
);
*/
hdc=GetDC(hwnd);
/*
BOOL TextOut(
HDC hdc, // handle to device context
int nXStart, // x-coordinate of starting position
int nYStart, // y-coordinate of starting position
LPCTSTR lpString, // pointer to string
int cbString // number of characters in string
);
*/
TextOut(hdc,0,50,"湖南省湘潭市湘潭大学1",strlen("湖南省湘潭市湘潭大学1"));
ReleaseDC(hwnd,hdc);//释放DC
break;
case WM_PAINT://窗口重绘
HDC hDC;
PAINTSTRUCT ps;
/*
HDC BeginPaint(
HWND hwnd, // handle to window
LPPAINTSTRUCT lpPaint
// pointer to structure for paint information
);
*/
hDC=BeginPaint(hwnd,&ps);//只能在WM_PAINT里面使用
TextOut(hDC,0,0,"湖南省湘潭市湘潭大学hDC",strlen("湖南省湘潭市湘潭大学hDC"));
EndPaint(hwnd,&ps);//只能在WM_PAINT里面使用
break;
case WM_CLOSE://关闭窗口时响应
if(IDYES==MessageBox(hwnd,"是否真的结束?","湘潭大学",MB_YESNO))
{
DestroyWindow(hwnd);//销掉hwnd窗口 还会发送 WM_DESTROY、WM_NCDESTROY 消息
}
break;
case WM_DESTROY:
PostQuitMessage(0);//退出程序
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}
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