VC++学习笔记(1)

今天开始学习VC++,照着书上写了几个Win32的程序。

1，#include<windows.h>


LRESULTCALLBACKWndProc(HWNDhwnd,UINTiMsg,WPARAMwParam,LPARAMlParam)
{
HDChdc;//设备环境句柄
PAINTSTRUCTps;

RECTrect;
POINTpoint;

switch(iMsg)
{
caseWM_PAINT:
{
hdc=BeginPaint(hwnd,&ps);
GetClientRect(hwnd,&rect);
DrawText(hdc,"Hello,VC6.0!",-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);
EndPaint(hwnd,&ps);
return0;
}
caseWM_LBUTTONDOWN:
{
hdc=GetDC(hwnd);
point.x=LOWORD(lParam);
point.y=HIWORD(lParam);
Ellipse(hdc,point.x-50,point.y-50,point.x+50,point.y+50);
ReleaseDC(hwnd,hdc);
return0;
}
caseWM_DESTROY:
{
PostQuitMessage(0);
return0;
}
}
returnDefWindowProc(hwnd,iMsg,wParam,lParam);

}

intWINAPIWinMain(HINSTANCEhInstance,HINSTANCEhPrevInstance,LPSTRlpCmdLine,intnShowCmd)
{
staticcharszAppName[]="HelloWin32";//应用程序名
HWNDhwnd;//窗口句柄
MSGmsg;//消息
WNDCLASSEXwndclass;//窗口类
wndclass.cbSize=sizeof(wndclass);//窗口类结构的大小
wndclass.style=CS_HREDRAW|CS_VREDRAW;//类风格：水平和垂直方向重画
wndclass.lpfnWndProc=WndProc;//窗口过程
wndclass.cbClsExtra=0;
wndclass.cbWndExtra=0;
wndclass.hInstance=hInstance;
wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszClassName=szAppName;
wndclass.lpszMenuName=NULL;
wndclass.hIconSm=LoadIcon(NULL,IDI_APPLICATION);

RegisterClassEx(&wndclass);

hwnd=CreateWindow(szAppName,
"TheHelloApp",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
ShowWindow(hwnd,nShowCmd);
UpdateWindow(hwnd);

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

returnmsg.wParam;
}

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

2，//t1.h
classCMyApp:publicCWinApp
{
public:
virtualBOOLInitInstance();
};

classCMainWindow:publicCFrameWnd
{
public:
CMainWindow();
protected:
afx_msgvoidOnPaint();
afx_msgvoidOnLButtonDown(UINTnFlags,CPointpoint);
DECLARE_MESSAGE_MAP()
};

//t1.cpp
#include<afxwin.h>
#include"t1.h"

CMyAppmyApp;

BOOLCMyApp::InitInstance()
{
this->m_pMainWnd=newCMainWindow;
this->m_pMainWnd->ShowWindow(this->m_nCmdShow);
this->m_pMainWnd->UpdateWindow();
returnTRUE;
}

BEGIN_MESSAGE_MAP(CMainWindow,CFrameWnd)
ON_WM_PAINT()
ON_WM_LBUTTONDOWN()
END_MESSAGE_MAP()

CMainWindow::CMainWindow()
{
Create(NULL,_T("TheMFCApplication"));
}

voidCMainWindow::OnPaint()
{
CPaintDCdc(this);
CRectrect;
GetClientRect(&rect);
dc.DrawText("WeclometoVC!!",-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);

}

voidCMainWindow::OnLButtonDown(UINTnFlags,CPointpoint)
{
CClientDCdc(this);
CRectrect(point.x-50,point.y-50,point.x+50,point.y+50);
dc.Ellipse(rect);
}