博客园_Clingingboy

VC问题记录

2012-05-21T03:25:00Z

Modern C++ Design 学习笔记-第3章

2012-03-09T06:46:00Z

1.Length

template <class T, class U>
struct Typelist
{
typedef T Head;
typedef U Tail;
};
class NullType {};
template <class TList> struct Length;
//特化
template <> struct Length<NullType>
{
enum { value = 0 };
};
//递归式
template <class T, class U>
struct Length< Typelist<T, U> >
{
enum { value = 1 + Length<U>::value };
};

#define LOKI_TYPELIST_1(T1) Typelist<T1, NullType>

#define LOKI_TYPELIST_2(T1, T2) Typelist<T1, LOKI_TYPELIST_1(T2) >

#define LOKI_TYPELIST_3(T1, T2, T3) Typelist<T1, LOKI_TYPELIST_2(T2, T3) >

int main()
{
//3
std::size_t n=Length<LOKI_TYPELIST_3(int,int,int)>::value;
}

2.typedef typename的定义

见此

template <class TList, unsigned int index> struct TypeAt;

template <class Head, class Tail>
struct TypeAt<Typelist<Head, Tail>, 0>
{
typedef Head Result;
};

template <class Head, class Tail, unsigned int i>
struct TypeAt<Typelist<Head, Tail>, i>
{
typedef typename TypeAt<Tail, i - 1>::Result Result;
};

http://blog.163.com/cp7618@yeah/blog/static/70234777201122111034365/

http://www.cnblogs.com/carekee/articles/1748675.html

typename告诉编译器, 后面的消息XXX::type是一个已经存在于某处的类型的名字(type name)

3.TypeAtNonStrict

加了一个默认值DefaultType

template <class TList, unsigned int index,
typename DefaultType = NullType>
struct TypeAtNonStrict
{
typedef DefaultType Result;
};

template <class Head, class Tail, typename DefaultType>
struct TypeAtNonStrict<Typelist<Head, Tail>, 0, DefaultType>
{
typedef Head Result;
};

template <class Head, class Tail, unsigned int i, typename DefaultType>
struct TypeAtNonStrict<Typelist<Head, Tail>, i, DefaultType>
{
typedef typename
TypeAtNonStrict<Tail, i - 1, DefaultType>::Result Result;
};

4.IndexOf

也是递归式,定义了一个temp临时变量

template <class TList, class T> struct IndexOf;

template <class T>
struct IndexOf<NullType, T>
{
enum { value = -1 };
};

template <class T, class Tail>
struct IndexOf<Typelist<T, Tail>, T>
{
enum { value = 0 };
};

template <class Head, class Tail, class T>
struct IndexOf<Typelist<Head, Tail>, T>
{
private:
enum { temp = IndexOf<Tail, T>::value };
public:
enum { value = (temp == -1 ? -1 : 1 + temp) };
};

5.Append

6.Erase

本文链接

MFC中的问题记录 2012-2-20

2012-02-20T08:28:00Z

模态窗体的实现

bool CWindowWnd::ShowModal()
{
ASSERT(::IsWindow(m_hWnd));

HWND hWndParent = GetWindowOwner(m_hWnd);
::ShowWindow(m_hWnd, SW_SHOWNORMAL);
::EnableWindow(hWndParent, FALSE);
MSG msg = { 0 };
while( ::IsWindow(m_hWnd) && ::GetMessage(&msg, NULL, 0, 0) ) {
if( msg.message == WM_CLOSE ) {
::EnableWindow(hWndParent, TRUE);
::SetFocus(hWndParent);
}
if( !CPaintManagerUI::TranslateMessage(&msg) ) {
::TranslateMessage(&msg);
::DispatchMessage(&msg);
}
if( msg.message == WM_QUIT ) break;
}
::EnableWindow(hWndParent, TRUE);
::SetFocus(hWndParent);
if( msg.message == WM_QUIT ) ::PostQuitMessage(msg.wParam);
return true;
}
谈谈父窗口和所有者窗口
WM_NCCREATE
GWLP_USERDATA
Sets the user data associated with the window. This data is intended for use by the application that created the window. Its value is initially zero.
《C++设计新思维》读书笔记

本文链接

Windows Image Lists

2012-02-14T08:33:00Z

参考:http://msdn.microsoft.com/en-us/library/bb761389(VS.85).aspx

ImageList_Create Creates a new image list.
ImageList_AddIcon Adds an icon or cursor to an image list. ImageList_AddIcon calls the ImageList_ReplaceIcon function.
ImageList_ReplaceIcon(important) Replaces an image with an icon or cursor. If i is -1, the function appends the image to the end of the list. Returns the index of the image if successful, or -1 otherwise.

// Create a masked image list large enough to hold the icons.
HIMAGELIST himlIcons = ImageList_Create(CX_ICON, CY_ICON, ILC_MASK, NUM_ICONS, 0);

// Load the icon resources, and add the icons to the image list.
HICON hicon = AfxGetApp()->LoadIcon(IDR_DEMOTYPE);
int g_nBird = ImageList_AddIcon(himlIcons, hicon);

hicon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
int g_nTree = ImageList_AddIcon(himlIcons, hicon);

ImageList_Add Adds an image or images to an image list.
ImageList_Remove Removes an image from an image list.
ImageList_Replace Replaces an image in an image list with a new image.
ImageList_GetIcon Creates an icon from an image and mask in an image list.
ImageList_GetIconSize Retrieves the dimensions of images in an image list. All images in an image list have the same dimensions.
ImageList_GetImageCount Retrieves the number of images in an image list.
ImageList_SetImageCount Resizes an existing image list.
ImageList_Draw Draws an image list item in the specified device context.
ImageList_Duplicate Creates a duplicate of an existing image list.
ImageList_SetIconSize Sets the dimensions of images in an image list and removes all images from the list.
ImageList_LoadImage Creates an image list from the specified bitmap.
SHGetImageList Retrieves an image list.

本文链接

Win32 菜单光标

2012-02-14T04:47:00Z

漏了写总是心里不舒服

2.1 如何动态添加和删除菜单项

四个方法:AppendMenu,InsertMenu,RemoveMenu,DeleteMenu

/////////////////////////////////////////////////////////////////////////////
// CMainFrame message handlers
void CMainFrame::OnAppendMenu()
{
//获得主菜单
CMenu* pMenu = GetMenu();
//获得子菜单
CMenu* pSubMenu = pMenu->GetSubMenu(4);

if (pSubMenu->GetMenuItemCount() == 4)
{
//在菜单末端添加菜单项
pSubMenu->AppendMenu(MF_STRING, ID_TEST_MENU, _T("新菜单项"));

//重画菜单
DrawMenuBar();
}
}

void CMainFrame::OnInsertMenu()
{
//获得主菜单
CMenu* pMenu = GetMenu();
//获得子菜单
CMenu* pSubMenu = pMenu->GetSubMenu(4);

if (pSubMenu->GetMenuItemCount() == 4)
{
//在菜单指定位置添加菜单项
pSubMenu->InsertMenu(1, MF_BYPOSITION, ID_TEST_MENU, _T("新菜单项"));

//重画菜单
DrawMenuBar();
}
}

void CMainFrame::OnRemoveMenu()
{
//获得主菜单
CMenu* pMenu = GetMenu();
//获得子菜单
CMenu* pSubMenu = pMenu->GetSubMenu(4);

if (pSubMenu->GetMenuItemCount() == 5)
{
//删除菜单项
pSubMenu->RemoveMenu(4, MF_BYPOSITION);

//重画菜单
DrawMenuBar();
}
}

void CMainFrame::OnDeleteMenu()
{
//获得主菜单
CMenu* pMenu = GetMenu();
//获得子菜单
CMenu* pSubMenu = pMenu->GetSubMenu(4);

if (pSubMenu->GetMenuItemCount() == 5)
{
//删除菜单项
pSubMenu->DeleteMenu(4, MF_BYPOSITION);

//重画菜单
DrawMenuBar();
}
}

2.2 如何在系统菜单中添加菜单项

GetSystemMenu方法

//获得系统菜单
CMenu* pMenu = GetSystemMenu(FALSE);

//删除系统菜单项
pMenu->RemoveMenu(SC_MOVE, MF_STRING);

//添加菜单项
pMenu->InsertMenu(0, MF_BYPOSITION, ID_TEST_MENU, _T("测试菜单项"));

2.3 如何禁用关闭按钮

EnableMenuItem方法

//获得系统菜单
CMenu* pMenu = GetSystemMenu(FALSE);

//禁用关闭按钮
pMenu->EnableMenuItem(SC_CLOSE, MF_BYCOMMAND | MF_GRAYED);

2.4 如何启用和禁用菜单项

使用CCmdUI对象

void CMainFrame::OnTestMenu1()
{
m_bEnable1 = FALSE;
m_bEnable2 = TRUE;
}

void CMainFrame::OnUpdateTestMenu1(CCmdUI* pCmdUI)
{
//启用或禁用菜单1
pCmdUI->Enable(m_bEnable1);
}

void CMainFrame::OnTestMenu2()
{
m_bEnable1 = TRUE;
m_bEnable2 = FALSE;
}

void CMainFrame::OnUpdateTestMenu2(CCmdUI* pCmdUI)
{
//启用或禁用菜单2
pCmdUI->Enable(m_bEnable2);
}

2.5 如何设置菜单项的检查状态

CheckMenuItem方法CheckMenuRadioItem则是单选

void CMainFrame::OnUpdateTestMenu(CCmdUI* pCmdUI)
{
CMenu menu;
//menu.CheckMenuItem();
//设置菜单项检查状态
pCmdUI->SetCheck(m_nCheck);
}

2.6 如何实现快捷菜单(右键菜单)

TrackPopupMenu方法

void CDemoView::OnContextMenu(CWnd* pWnd, CPoint point)
{
CMenu menu;

//加载菜单
if (!menu.LoadMenu(IDR_MENU))
{
return;
}

//获得子菜单
CMenu* pPopupMenu = menu.GetSubMenu(0);

//弹出菜单
pPopupMenu->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON,
point.x, point.y, pWnd);
}

2.7 如何获得光标的位置

m_Point为mousemove时的坐标

void CDemoView::OnDraw(CDC* pDC)
{
//获得客户区坐标
CRect rect;
GetClientRect(rect);

//绘制十字光标
pDC->MoveTo(0, m_Point.y);
pDC->LineTo(rect.Width(), m_Point.y);
pDC->MoveTo(m_Point.x, 0);
pDC->LineTo(m_Point.x, rect.Height());

//输出光标坐标
CString strText =_T("");
strText.Format(_T("%d, %d"), m_Point.x, m_Point.y);
pDC->SetBkMode(TRANSPARENT);
pDC->SetTextAlign(TA_RIGHT | TA_BOTTOM);
pDC->TextOut(m_Point.x, m_Point.y, strText);
}

2.8 如何限制光标的移动范围

ClipCursor方法

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point)
{
//获得客户区坐标
CRect rect;
GetClientRect(rect);

rect.left = rect.left + rect.Width() / 4;
rect.right = rect.right - rect.Width() / 4;
rect.top = rect.top + rect.Height() / 4;
rect.bottom = rect.bottom - rect.Height() / 4;

//映射屏幕坐标
ClientToScreen(rect);

//限制光标移动范围
ClipCursor(&rect);

CView::OnLButtonDown(nFlags, point);
}

void CDemoView::OnLButtonUp(UINT nFlags, CPoint point)
{
//光标自由移动
ClipCursor(NULL);

CView::OnLButtonUp(nFlags, point);
}

2.9 如何使用预定义光标

LoadStandardCursor方法和SetCursor方法

BOOL CDemoView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
//设置光标
::SetCursor(m_hCursor);

return TRUE;
// return CView::OnSetCursor(pWnd, nHitTest, message);
}

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point)
{
//加载光标
m_hCursor = AfxGetApp()->LoadStandardCursor(IDC_CROSS);

//设置光标
::SetCursor(m_hCursor);

CView::OnLButtonDown(nFlags, point);
}

void CDemoView::OnLButtonUp(UINT nFlags, CPoint point)
{
//加载光标
m_hCursor = AfxGetApp()->LoadStandardCursor(IDC_SIZENWSE);

//设置光标
::SetCursor(m_hCursor);

CView::OnLButtonUp(nFlags, point);
}

2.10 如何使用自定义光标

LoadCursor方法载入

BOOL CDemoView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
//设置光标
::SetCursor(m_hCursor);

return TRUE;
// return CView::OnSetCursor(pWnd, nHitTest, message);
}

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point)
{
//加载光标
m_hCursor = AfxGetApp()->LoadCursor(IDC_CURSOR2);

//设置光标
::SetCursor(m_hCursor);

CView::OnLButtonDown(nFlags, point);
}

void CDemoView::OnLButtonUp(UINT nFlags, CPoint point)
{
//加载光标
m_hCursor = AfxGetApp()->LoadCursor(IDC_CURSOR1);

//设置光标
::SetCursor(m_hCursor);

CView::OnLButtonUp(nFlags, point);
}

2.11 如何使用等待光标

BeginWaitCursor和EndWaitCursor

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point)
{
//启动等待光标
BeginWaitCursor();

//休眠
Sleep(5000);

//结束等待光标
EndWaitCursor();

CView::OnLButtonDown(nFlags, point);
}

本文链接

画自定义尺寸的圆角背景

2012-01-29T14:09:00Z

首先准备一个png的圆角背景图

1.分三部分画，可以是”上，中，下”，也可以是“左，中，右”

注意的是圆角的宽度和高度

2.绘制的时候不要忘记设置ImageAttributes的绘制模式,这样就可以画无限的高度和宽度

ImageAttributes imgAtt;
imgAtt.SetWrapMode(WrapModeTileFlipY);

绘制效果

源码Demo

void DrawMargin(Graphics& g, Image* pImage, Rect& rcDst, Rect& rcSrc, int nMarginLeft, int nMarginRight,
int nMarginTop, int nMarginBottom, BOOL bDrawCenter/* = TRUE*/)
{
//ASSERT(pImage);
int nImgWidth = pImage->GetWidth();
int nImgHeight = pImage->GetHeight();
Rect rcImage(0, 0, nImgWidth, nImgHeight);
//ASSERT(rcImage.Contains(rcSrc));

//ASSERT((rcSrc.Width > (nMarginLeft + nMarginRight)) && (rcSrc.Height > (nMarginTop + nMarginBottom)));
if((rcDst.Width <= (nMarginLeft + nMarginRight)) || (rcDst.Height <= (nMarginTop + nMarginBottom)))
g.DrawImage(pImage, rcDst, rcSrc.X, rcSrc.Y, rcSrc.Width, rcSrc.Height, UnitPixel);

ImageAttributes imgAtt;

//上
if(nMarginTop)
{
if(nMarginLeft)
{
Rect rcTopLeft(rcDst.X, rcDst.Y, nMarginLeft, nMarginTop);
g.DrawImage(pImage, rcTopLeft, rcSrc.X, rcSrc.Y, nMarginLeft, nMarginTop, UnitPixel);
}
Rect rcTop(rcDst.X + nMarginLeft, rcDst.Y, rcDst.Width - nMarginLeft - nMarginRight, nMarginTop);
imgAtt.SetWrapMode(WrapModeTileFlipX);
g.DrawImage(pImage, rcTop, rcSrc.X + nMarginLeft, rcSrc.Y, rcSrc.Width - nMarginLeft - nMarginRight, nMarginTop, UnitPixel, &imgAtt);
if(nMarginRight)
{
Rect rcTopRight(rcDst.GetRight() - nMarginRight, rcDst.Y, nMarginRight, nMarginTop);
g.DrawImage(pImage, rcTopRight, rcSrc.GetRight() - nMarginRight, rcSrc.Y, nMarginRight, nMarginTop, UnitPixel);
}
}

//中
if(nMarginLeft)
{
Rect rcLeft(rcDst.X, rcDst.Y + nMarginTop, nMarginLeft, rcDst.Height - nMarginTop - nMarginBottom);
imgAtt.SetWrapMode(WrapModeTileFlipY);
g.DrawImage(pImage, rcLeft, rcSrc.X, rcSrc.Y + nMarginTop, nMarginLeft, rcSrc.Height - nMarginTop - nMarginBottom, UnitPixel, &imgAtt);
}
if(bDrawCenter)
{
Rect rcCenter(rcDst.X + nMarginLeft, rcDst.Y + nMarginTop, rcDst.Width - nMarginLeft - nMarginRight, rcDst.Height - nMarginTop - nMarginBottom);
imgAtt.SetWrapMode(WrapModeTileFlipXY);
g.DrawImage(pImage, rcCenter, rcSrc.X + nMarginLeft, rcSrc.Y + nMarginTop, rcSrc.Width - nMarginLeft - nMarginRight, rcSrc.Height - nMarginTop - nMarginBottom, UnitPixel, &imgAtt);
}
if(nMarginRight)
{
Rect rcRight(rcDst.GetRight() - nMarginRight, rcDst.Y + nMarginTop, nMarginRight, rcDst.Height - nMarginTop - nMarginBottom);
imgAtt.SetWrapMode(WrapModeTileFlipY);
g.DrawImage(pImage, rcRight, rcSrc.GetRight() - nMarginRight, rcSrc.Y + nMarginTop, nMarginRight, rcSrc.Height - nMarginTop - nMarginBottom, UnitPixel, &imgAtt);
}

//下
if(nMarginTop)
{
if(nMarginLeft)
{
Rect rcBottomLeft(rcDst.X, rcDst.GetBottom() - nMarginBottom, nMarginLeft, nMarginBottom);
g.DrawImage(pImage, rcBottomLeft, rcSrc.X, rcSrc.GetBottom() - nMarginBottom, nMarginLeft, nMarginBottom, UnitPixel);
}
Rect rcBottom(rcDst.X + nMarginLeft, rcDst.GetBottom() - nMarginBottom, rcDst.Width - nMarginLeft - nMarginRight, nMarginBottom);
imgAtt.SetWrapMode(WrapModeTileFlipX);
g.DrawImage(pImage, rcBottom, rcSrc.X + nMarginLeft, rcSrc.GetBottom() - nMarginBottom, rcSrc.Width - nMarginLeft - nMarginRight, nMarginBottom, UnitPixel, &imgAtt);
if(nMarginRight)
{
Rect rcBottomRight(rcDst.GetRight() - nMarginRight, rcDst.GetBottom() - nMarginBottom, nMarginRight, nMarginBottom);
g.DrawImage(pImage, rcBottomRight, rcSrc.GetRight() - nMarginRight, rcSrc.GetBottom() - nMarginBottom, nMarginRight, nMarginBottom, UnitPixel);
}
}
}

void DrawMargin1(Graphics& g, Image* pImage, Rect& rcDst, int nMarginLeft, int nMarginRight, int nMarginTop, int nMarginBottom)
{

int nImgWidth = pImage->GetWidth();
int nImgHeight = pImage->GetHeight();
Rect rcSrc(0, 0, nImgWidth, nImgHeight);

DrawMargin(g, pImage, rcDst, rcSrc, nMarginLeft, nMarginRight, nMarginTop, nMarginBottom, TRUE);
}

本文链接

MFC中的一些问题记录

2012-01-09T14:59:00Z

CWnd中PreCreateWindow、PreSubclassWindow、SubclassWindow的区别
【原】CListCtrl 使用技巧
改变 CListCtrl、CHeaderCtrl 高度、字体、颜色和背景
深度解析VC中的消息（上）
What are TCHAR, WCHAR, LPSTR, LPWSTR, LPCTSTR etc?
关于WM_ERASEBKGND和WM_PAINT的深刻理解
关于重绘背景的理解：每次重绘，必须有一个背景色，默认情况下,windows处理了这个背景色消息。
这里有两个动作需要处理: 1.清除背景(注意不是背景色,可以理解为清除画布)2.然后重新绘制背景色
如果返回return true,则告诉系统已经自己处理过了，不需要系统来重绘背景色
参考opengl:http://www.cnblogs.com/Clingingboy/archive/2010/10/16/1853038.html
InvalidateRect MFC的Invalidate方法默认重绘整个窗体
GDI+ 绘制超链接文本,定义StringFormat 的SetLineAlignment
StringFormat stringFormat;
stringFormat.SetLineAlignment(StringAlignmentCenter);
stringFormat.SetFormatFlags(StringFormatFlagsLineLimit | StringFormatFlagsNoWrap);
使用API判断网络是否连通(InternetGetConnectedState / IsNetworkAlive)
关于WM_NCHITTEST消息
http://www.codeproject.com/KB/MFC/CustomWindow.aspx
C++变量命名规则
自绘菜单
WM_CTLCOLOR消息
_tcslen(".....")和stlen(".....")函数有什么区别
InternetOpen具体三种方式的使用
VC++得到任务栏的高度和位置的方法
任务栏位置
SAFEARRAY使用实例
在COM中使用数组参数-SafeArray
浅析C++内存分配方式
目前比较热的GUI 总结
画自定义尺寸的圆角背景
设置右键菜单某个项为粗体
悬浮窗右键菜单第二次无法自动隐藏的问题
SetWindowPos
DeleteMenu和RemoveMenu的区别
Custom Draw
用VC实现TOOL TIP (EnableToolTips,OnToolHitTest,TTN_NEEDTEXT)VC中给树形控件的图标加上工具提示
VC6.0 文件拖拽
Window下拖放操作Drag & Drop 全解析
防止CListCtrl闪烁的几种方法

本文链接

WinINet Asynchronous

2011-12-03T15:57:00Z

先参考此文档http://wenku.baidu.com/view/4f3558edf8c75fbfc77db229.html的第13页

demo参考

http://www.codeproject.com/KB/IP/WinInetTest.aspx

http://www.codeproject.com/KB/IP/asynchttp.aspx

http://www.codeproject.com/KB/IP/asyncwininet.aspx

关于WinHTTP和WinINet

http://alienchang.iteye.com/blog/1155248

http://www.cnblogs.com/awpatp/archive/2010/10/10/1847285.html

http://msdn.microsoft.com/en-us/library/aa384068.aspx

本文链接

WinINet function(2)Request

2011-11-27T14:06:00Z

参考此文档：http://wenku.baidu.com/view/4f3558edf8c75fbfc77db229.html

参考:http://wenku.baidu.com/view/b5364b87ec3a87c24028c438.html

InternetOpenUrl的内部

1.InternetConnect

Opens an File Transfer Protocol (FTP), Gopher, or HTTP session for a given site.

2.HttpOpenRequest

Creates an HTTP request handle.

3.HttpSendRequest

Sends the specified request to the HTTP server.

4.HttpQueryInfo

Retrieves header information associated with an HTTP request.

Demo

HINTERNET hInternet = InternetOpen("HttpAuth Sample", // app name
INTERNET_OPEN_TYPE_PRECONFIG, // access type
NULL, // proxy server
0, // proxy port
0); // flags

HINTERNET hConnect = ::InternetConnect(hInternet,
"www.microsoft.com",
INTERNET_INVALID_PORT_NUMBER,
"",
"",
INTERNET_SERVICE_HTTP,
0,
0) ;

HINTERNET hHttpFile = ::HttpOpenRequest(hConnect,
"GET",
"/MSDN/MSDNINFO/",
HTTP_VERSION,
NULL,
0,
INTERNET_FLAG_DONT_CACHE,
0) ;
BOOL bSendRequest = ::HttpSendRequest(hHttpFile, NULL, 0, 0, 0);

// Get the length of the file.
char bufQuery[32] ;
DWORD dwLengthBufQuery = sizeof(bufQuery);
BOOL bQuery = ::HttpQueryInfo(hHttpFile,
HTTP_QUERY_CONTENT_LENGTH,
bufQuery,
&dwLengthBufQuery,NULL) ;

// Convert length from ASCII string to a DWORD.
DWORD dwFileSize = (DWORD)atol(bufQuery) ;
// Allocate a buffer for the file.

char* buffer = new char[dwFileSize+1] ;

// Read the file into the buffer.
DWORD dwBytesRead ;
BOOL bRead = ::InternetReadFile(hHttpFile,
buffer,
dwFileSize+1,
&dwBytesRead);
buffer[dwBytesRead] = 0 ;

Other functions

HttpAddRequestHeaders

Adds one or more HTTP request headers to the HTTP request handle.

参考:http://www.cnblogs.com/songsu/articles/1346782.html

InternetSetCookie

Creates a cookie associated with the specified URL.

InternetGetCookie

Retrieves the cookie for the specified URL.

BOOL res=InternetSetCookie("http://www.microsoft.com","a","test");
TCHAR cookie[1024];
DWORD leh;
res=InternetGetCookie("http://www.microsoft.com",NULL,cookie,&leh);

本文链接

WinINet function(1)

2011-11-27T02:48:00Z

一.Url相关函数

1.InternetCreateUrl

Cracks a URL into its component parts.

#define URL_STRING_TEST "http://www.cnblogs.com/Clingingboy/archive/2011/11/20/2256200.html"
void main()
{
TCHAR szHostName[128];
TCHAR szUrlPath[256];
URL_COMPONENTS crackedURL;
ZeroMemory(&crackedURL, sizeof (URL_COMPONENTS));
crackedURL.dwStructSize = sizeof (URL_COMPONENTS);
crackedURL.lpszHostName = szHostName;
crackedURL.dwHostNameLength = sizeof(szHostName);
crackedURL.lpszUrlPath = szUrlPath;
crackedURL.dwUrlPathLength = sizeof(szUrlPath);
InternetCrackUrl(URL_STRING_TEST,(DWORD)strlen(URL_STRING_TEST),0,&crackedURL);
}

2.InternetCreateUrl

Creates a URL from its component parts.

DWORD urlLength;
InternetCreateUrl(&crackedURL,ICU_ESCAPE,szUrlPath,&urlLength);

3.InternetCanonicalizeUrl

Canonicalizes a URL, which includes converting unsafe characters and spaces into escape sequences.

InternetCanonicalizeUrl("http://www.xxx.com/viewthread.php?action=printable&tid=99 ",szUrlPath,&urlLength,ICU_ENCODE_SPACES_ONLY);

4.InternetCombineUrl

Combines a base and relative URL into a single URL.

InternetCombineUrl("http://www.xxx.com/","2256200.html",szUrlPath,&urlLength,ICU_BROWSER_MODE);

二.Internet基本应用相关函数

1.InternetOpen

Initializes an application's use of the WinINet functions.

2.InternetOpenUrl

Opens a resource specified by a complete FTP, Gopher, or HTTP URL.

3.InternetReadFile

Reads data from a handle opened by the InternetOpenUrl, FtpOpenFile, GopherOpenFile, or HttpOpenRequest function

4.InternetCloseHandle

Closes a single Internet handle.

应用1:打开因特网上指定的文件

void Download()
{

DWORD byteread=0;
char buffer[100];
memset(buffer,0,100);
HINTERNET internetopen;

internetopen=InternetOpen("Testing",INTERNET_OPEN_TYPE_PRECONFIG,NULL,NULL,0);
if (internetopen==NULL)
{
cout<<"Internet open failed!"<<endl;
return;
}
HINTERNET internetopenurl;
internetopenurl=InternetOpenUrl(internetopen,"http://www.cnblogs.com/Clingingboy/archive/2011/11/20/2256200.html",NULL,0,INTERNET_FLAG_RELOAD,0);
if (internetopenurl==NULL)
{
cout<<"Internet open url failed!"<<endl;
goto there;
}

BOOL hwrite;
DWORD written;
HANDLE createfile;
createfile=CreateFile("C://a.html",GENERIC_WRITE,0,0,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,0);
if (createfile==INVALID_HANDLE_VALUE)
{
cout<<"Create File failed!"<<endl;
goto next;
}

BOOL internetreadfile;
while(1)
{
internetreadfile=InternetReadFile(internetopenurl,buffer,sizeof(buffer),&byteread);
if(byteread==0)
break;
hwrite=WriteFile(createfile,buffer,sizeof(buffer),&written,NULL);
if (hwrite==0)
{
cout<<"Write to file failed!"<<endl;
goto here;
}
}

cout<<"Finished downloading!"<<endl;

here:
CloseHandle(createfile);
next:
InternetCloseHandle(internetopenurl);
there:
InternetCloseHandle(internetopen);

}

三.连接检查函数

1.InternetCheckConnection

Allows an application to check if a connection to the Internet can be established.

BOOL result=InternetCheckConnection(URL_STRING_TEST,FLAG_ICC_FORCE_CONNECTION,0);

2.InternetAttemptConnect

Attempts to make a connection to the Internet.

BOOL result=InternetAttemptConnect(0);

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