Use L". Add a comment. Active Oldest Votes. Improve this answer. Adrian McCarthy Joachim Isaksson Joachim Isaksson k 22 22 gold badges silver badges bronze badges. And how can i write some data into temp. For more information, see File Streams. The requested access to the file or device, which can be summarized as read, write, both or neither zero.
You cannot request an access mode that conflicts with the sharing mode that is specified by the dwShareMode parameter in an open request that already has an open handle. For more information, see the Remarks section of this topic and Creating and Opening Files.
The requested sharing mode of the file or device, which can be read, write, both, delete, all of these, or none refer to the following table. Access requests to attributes or extended attributes are not affected by this flag. If this parameter is zero and CreateFile succeeds, the file or device cannot be shared and cannot be opened again until the handle to the file or device is closed.
For more information, see the Remarks section. You cannot request a sharing mode that conflicts with the access mode that is specified in an existing request that has an open handle. To enable a process to share a file or device while another process has the file or device open, use a compatible combination of one or more of the following values. For more information about valid combinations of this parameter with the dwDesiredAccess parameter, see Creating and Opening Files.
If this flag is not specified, but the file or device has been opened for delete access, the function fails. If this flag is not specified, but the file or device has been opened for read access, the function fails. If this flag is not specified, but the file or device has been opened for write access or has a file mapping with write access, the function fails. If this parameter is NULL , the handle returned by CreateFile cannot be inherited by any child processes the application may create and the file or device associated with the returned handle gets a default security descriptor.
If this member is NULL , the file or device associated with the returned handle is assigned a default security descriptor. CreateFile ignores the lpSecurityDescriptor member when opening an existing file or device, but continues to use the bInheritHandle member. The bInheritHandle member of the structure specifies whether the returned handle can be inherited.
If the specified file does not exist and is a valid path, a new file is created, the function succeeds, and the last-error code is set to zero. If the specified file does not exist and is a valid path to a writable location, a new file is created. If the specified file does not exist and is a valid path to a writable location, the function creates a file and the last-error code is set to zero.
Additional SQOS-related flags information is presented in the table following the attributes and flags tables. For more advanced access to file attributes, see SetFileAttributes. For a complete list of all file attributes with their values and descriptions, see File Attribute Constants.
For more information, see the Caching Behavior section of this topic. You must set this flag to obtain a handle to a directory. A directory handle can be passed to some functions instead of a file handle.
For additional information, see the Caching Behavior section of this topic. For more information, see Impersonation Levels. This allows the client to limit the groups and privileges that a server can use while impersonating the client.
The template file supplies file attributes and extended attributes for the file that is being created. When opening a new encrypted file, the file inherits the discretionary access control list from its parent directory. For additional information, see File Encryption. If the function succeeds, the return value is an open handle to the specified file, device, named pipe, or mail slot.
To get extended error information, call GetLastError. The text attempts to use the word file only when referring specifically to data stored in an actual file on a file system. This liberal use of the term file is particularly prevalent in constant names and parameter names because of the previously mentioned historical reasons. When an application is finished using the object handle returned by CreateFile , use the CloseHandle function to close the handle.
This not only frees up system resources, but can have wider influence on things like sharing the file or device and committing data to disk. Specifics are noted within this topic as appropriate. To avoid the sharing violation in this scenario, open the remote file or directory with the DELETE access right only, or call DeleteFile without first opening the file or directory for deletion.
Some file systems, such as the NTFS file system, support compression or encryption for individual files and directories. On volumes that have a mounted file system with this support, a new file inherits the compression and encryption attributes of its directory.
You cannot use CreateFile to control compression, decompression, or decryption on a file or directory. Windows Server and Windows XP: For backward compatibility purposes, CreateFile does not apply inheritance rules when you specify a security descriptor in lpSecurityAttributes.
Access requests to attributes or extended attributes are not affected by this flag. If this parameter is zero and CreateFile2 succeeds, the file or device cannot be shared and cannot be opened again until the handle to the file or device is closed.
For more information, see the Remarks section. You cannot request a sharing mode that conflicts with the access mode that is specified in an existing request that has an open handle.
To enable a process to share a file or device while another process has the file or device open, use a compatible combination of one or more of the following values. For more information about valid combinations of this parameter with the dwDesiredAccess parameter, see Creating and Opening Files. If this flag is not specified, but the file or device has been opened for delete access, the function fails.
If this flag is not specified, but the file or device has been opened for read access, the function fails. If a file or directory is being opened and this flag is not specified, and the caller does not have write access to the file or directory, the function fails. If this flag is not specified, but the file or device has been opened for write access or has a file mapping with write access, the function fails. If the specified file does not exist and is a valid path, a new file is created, the function succeeds, and the last-error code is set to zero.
If the specified file does not exist and is a valid path to a writable location, a new file is created. If the specified file does not exist and is a valid path to a writable location, the function creates a file and the last-error code is set to zero. If the function succeeds, the return value is an open handle to the specified file, device, named pipe, or mail slot.
To get extended error information, call GetLastError. For more information, see Using the Windows Headers. The text attempts to use the word file only when referring specifically to data stored in an actual file on a file system.
This liberal use of the term file is particularly prevalent in constant names and parameter names because of the previously mentioned historical reasons. When an application is finished using the object handle returned by CreateFile2 , use the CloseHandle function to close the handle.
This not only frees up system resources, but can have wider influence on things like sharing the file or device and committing data to disk. Specifics are noted within this topic as appropriate. Some file systems, such as the NTFS file system, support compression or encryption for individual files and directories. On volumes that have a mounted file system with this support, a new file inherits the compression and encryption attributes of its directory.
You cannot use CreateFile2 to control compression, decompression, or decryption on a file or directory. The following information regarding this member also applies:. If you call CreateFile2 on a file that is pending deletion as a result of a previous call to DeleteFile , the function fails. Note how the time zone conversion is necessary. Note the ' expression necessary to pass 0 as lpSecurityAttributes. Print "Could not open the file successfully -- aborting.
Print "The file was created on "; thetime.
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