创建指定大小的空文件

 1 BOOL CreateFileDemo(TCHAR* pFileName, DWORD dwSize)
 2 {
 3     HANDLE hFile;
 4     HANDLE hMapFile;
 5 
 6     hFile = CreateFile(
 7         pFileName,
 8         GENERIC_WRITE | GENERIC_READ,
 9         FILE_SHARE_READ,
10         NULL,
11         CREATE_ALWAYS,
12         FILE_ATTRIBUTE_NORMAL,
13         NULL
14         );
15     if( hFile == INVALID_HANDLE_VALUE )
16     {
17         OutputDebugString(_T("CreateFile fail!/r/n"));
18         return FALSE;
19     }
20 
21     hMapFile = CreateFileMapping(
22         hFile,
23         NULL,
24         PAGE_READWRITE,
25         0,
26         dwSize,
27         NULL
28         );
29     if( hMapFile == NULL )
30     {
31         OutputDebugString(_T("CreateFileMapping fail!/r/n"));
32         CloseHandle( hFile );
33         return FALSE;    
34     }
35 
36     CloseHandle( hMapFile );
37     CloseHandle( hFile );
38 
39     return TRUE;
40 }