创建一个完整Win32程序
创建一个Win32程序的步骤：
1 WinMain函数的的定义
2 创建一个窗口
2.1.1 设计一个窗口类
2.1.2 注册窗口类
2.1.3 创建窗口
2.1.4 显示及更新窗口
3 进行消息循环
4 编写消息过程函数
WinMain
int WINAPI WinMain (
int WINAPI WinMain (
HINSTANCE hInstance, // handle to current instance，given by OS
HINSTANCE hPrevInstance, // handle to previous instance ,Null in Win32
LPSTR lpCmdLine,
// pointer to command line
int nCmdShow
// show state of window
);
创建一个窗口
通过WNDCLASS结构体来创建窗口类
typedef struct _WNDCLASS {
UINT style; 指定窗口的样式
WNDPROC lpfnWndProc;
窗口的回调函数
int cbClsExtra; 0
int cbWndExtra; 0
HANDLE hInstance;
HICON hIcon;
HCURSOR hCursor;
HBRUSH hbrBackground;
LPCTSTR lpszMenuName;
LPCTSTR lpszClassName;
} WNDCLASS;
注册窗口类
ATOM RegisterClass(
CONST WNDCLASS *lpWndClass
// address of structure with class
// data
);
创建窗口
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
);
显示及更新窗口
BOOL ShowWindow( int nCmdShow );
BOOL UpdateWindow(
HWND hWnd
// handle of window
);
消息循环
BOOL GetMessage(
LPMSG lpMsg,
// address of structure with message
HWND hWnd,
// handle of window
UINT wMsgFilterMin, // first message
UINT wMsgFilterMax
// last message
);
If the function retrieves a message other than WM_QUIT, the return value is nonzero.
If the function retrieves the WM_QUIT message, the return value is zero.
MSG msg;
While (GetMessage (&msg,NULL,0,0))
{
TranslateMessage();
DispatchMessage();
}
消息过程函数
LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);
函数原型一定要相同,函数名可以更改,函数用switch对消息进行处理.
程序:
#include <windows.h>
#include <stdio.h>
#include <stdio.h>
LRESULT CALLBACK WinProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);
int WINAPI WinMain
(
HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // command line
int nCmdShow // show state)
{
WNDCLASS wndcls;
HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // command line
int nCmdShow // show state)
{
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="wangjing";
wndcls.lpszMenuName=NULL;
wndcls.style=CS_HREDRAW | CS_VREDRAW;
RegisterClass(& wndcls);
HWND hwnd;
hwnd=CreateWindow(" wangjing","Title",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);
DispatchMessage(&msg);
}
while(GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
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:
char szChar[20];
sprintf(szChar,"char code is %d",wParam);
MessageBox(hwnd,szChar,"char",0);
break;
case WM_LBUTTONDOWN:
MessageBox(hwnd,"mouse clicked","message",0);
HDC hdc;
hdc=GetDC(hwnd);
TextOut(hdc,0,50,"程序员之家",strlen("程序员之家"));
//ReleaseDC(hwnd,hdc);
break;
case WM_PAINT:
HDC hDC;
PAINTSTRUCT ps;
hDC=BeginPaint(hwnd,&ps);
TextOut(hDC,0,0,"Test",strlen("Test"));
EndPaint(hwnd,&ps);
break;
case WM_CLOSE:
if(IDYES==MessageBox(hwnd,"是否真的结束？","message",MB_YESNO))
{
DestroyWindow(hwnd);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
)
{
switch(uMsg)
{
case WM_CHAR:
char szChar[20];
sprintf(szChar,"char code is %d",wParam);
MessageBox(hwnd,szChar,"char",0);
break;
case WM_LBUTTONDOWN:
MessageBox(hwnd,"mouse clicked","message",0);
HDC hdc;
hdc=GetDC(hwnd);
TextOut(hdc,0,50,"程序员之家",strlen("程序员之家"));
//ReleaseDC(hwnd,hdc);
break;
case WM_PAINT:
HDC hDC;
PAINTSTRUCT ps;
hDC=BeginPaint(hwnd,&ps);
TextOut(hDC,0,0,"Test",strlen("Test"));
EndPaint(hwnd,&ps);
break;
case WM_CLOSE:
if(IDYES==MessageBox(hwnd,"是否真的结束？","message",MB_YESNO))
{
DestroyWindow(hwnd);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}