CFile...

今天学会了CFile对象，原来MFC里面文件读写的方法有那么多的。还有用C++I/O的方法的。

不过,文档/视图类的交互,还有CFileDialog和做成文件读写的程序还没有.

另外,读取网络内容变成控件的内容也要学学...

还有，今天也知道了JavaScript的一些使用技巧。呵呵...

重要的是CFile的对象生成（lpszFileName），然后用CFile::Open来打开，再建立一个char的数组缓冲区，用CFile::Read来将读到的Byte放进去。

用.和用->是差不多的，不过一个是指针(->& *)，一个没有而已(.)。

这个问题还要弄明白！！！

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清除IE的历史记录的函数
#include <wininet.h>
#include <UrlHist.h>
#include <shlguid.h>
#include <objbase.h>

ClearHistory()
{
CoInitialize(NULL);
IUrlHistoryStg2 *pUrlHistoryStg2 = NULL;
HRESULT hr = CoCreateInstance(CLSID_CUrlHistory,NULL,1,IID_IUrlHistoryStg2,(LPVOID *)&pUrlHistoryStg2);
if(SUCCEEDED(hr))
{
pUrlHistoryStg2->ClearHistory();
pUrlHistoryStg2->Release();
}
CoUninitialize();
}

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CFile Class Members

Data Members

m_hFile

Usually contains the operating-system file handle.

Construction

CFile	Constructs a CFile object from a path or file handle.
Abort	Closes a file ignoring all warnings and errors.
Duplicate	Constructs a duplicate object based on this file.
Open	Safely opens a file with an error-testing option.
Close	Closes a file and deletes the object.

Input/Output

Read	Reads (unbuffered) data from a file at the current file position.
ReadHuge	Can read more than 64K of (unbuffered) data from a file at the current file position. Obsolete in 32-bit programming. See Read.
Write	Writes (unbuffered) data in a file to the current file position.
WriteHuge	Can write more than 64K of (unbuffered) data in a file to the current file position. Obsolete in 32-bit programming. See Write.
Flush	Flushes any data yet to be written.

Position

Seek	Positions the current file pointer.
SeekToBegin	Positions the current file pointer at the beginning of the file.
SeekToEnd	Positions the current file pointer at the end of the file.
GetLength	Retrieves the length of the file.
SetLength	Changes the length of the file.

Locking

LockRange	Locks a range of bytes in a file.
UnlockRange	Unlocks a range of bytes in a file.

Status

GetPosition	Retrieves the current file pointer.
GetStatus	Retrieves the status of this open file.
GetFileName	Retrieves the filename of the selected file.
GetFileTitle	Retrieves the title of the selected file.
GetFilePath	Retrieves the full file path of the selected file.
SetFilePath	Sets the full file path of the selected file.

Static

Rename	Renames the specified file (static function).
Remove	Deletes the specified file (static function).
GetStatus	Retrieves the status of the specified file (static, virtual function).
SetStatus	Sets the status of the specified file (static, virtual function).