COPYFILE2_EXTENDED_PARAMETERS structure

Contains extended parameters for the CopyFile2 function.

Syntax

typedef struct COPYFILE2_EXTENDED_PARAMETERS {
  DWORD                       dwSize;
  DWORD                       dwCopyFlags;
  BOOL                        *pfCancel;
  PCOPYFILE2_PROGRESS_ROUTINE pProgressRoutine;
  PVOID                       pvCallbackContext;
} COPYFILE2_EXTENDED_PARAMETERS;

Members

dwSize

Contains the size of this structure, sizeof(COPYFILE2_EXTENDED_PARAMETERS).

dwCopyFlags

Contains a combination of zero or more of these flag values.

Value	Meaning
COPY_FILE_ALLOW_DECRYPTED_DESTINATION 0x00000008	The copy will be attempted even if the destination file cannot be encrypted.
COPY_FILE_COPY_SYMLINK 0x00000800	If the source file is a symbolic link, the destination file is also a symbolic link pointing to the same file as the source symbolic link.
COPY_FILE_FAIL_IF_EXISTS 0x00000001	If the destination file exists the copy operation fails immediately. If a file or directory exists with the destination name then the CopyFile2 function call will fail with either HRESULT_FROM_WIN32(ERROR_ALREADY_EXISTS) or HRESULT_FROM_WIN32(ERROR_FILE_EXISTS). If COPY_FILE_RESUME_FROM_PAUSE is also specified then a failure is only triggered if the destination file does not have a valid restart header.
COPY_FILE_NO_BUFFERING 0x00001000	The copy is performed using unbuffered I/O, bypassing the system cache resources. This flag is recommended for very large file copies. It is not recommended to pause copies that are using this flag.
COPY_FILE_NO_OFFLOAD 0x00040000	Do not attempt to use the Windows Copy Offload mechanism. This is not generally recommended.
COPY_FILE_OPEN_SOURCE_FOR_WRITE 0x00000004	The file is copied and the source file is opened for write access.
COPY_FILE_RESTARTABLE 0x00000002	The file is copied in a manner that can be restarted if the same source and destination filenames are used again. This is slower.
COPY_FILE_REQUEST_SECURITY_PRIVILEGES 0x00002000	The copy is attempted, specifying ACCESS_SYSTEM_SECURITY for the source file and ACCESS_SYSTEM_SECURITY | WRITE_DAC | WRITE_OWNER for the destination file. If these requests are denied the access request will be reduced to the highest privilege level for which access is granted. For more information see SACL Access Right. This can be used to allow the CopyFile2ProgressRoutine callback to perform operations requiring higher privileges, such as copying the security attributes for the file.
COPY_FILE_RESUME_FROM_PAUSE 0x00004000	The destination file is examined to see if it was copied using COPY_FILE_RESTARTABLE. If so the copy is resumed. If not the file will be fully copied.

 

pfCancel

If this flag is set to TRUE during the copy operation then the copy operation is canceled.

pProgressRoutine

The optional address of a callback function of type PCOPYFILE2_PROGRESS_ROUTINE that is called each time another portion of the file has been copied. This parameter can be NULL. For more information on the progress callback function, see the CopyFile2ProgressRoutine callback function.

pvCallbackContext

A pointer to application-specific context information to be passed to the CopyFile2ProgressRoutine.

Remarks

To compile an application that uses this structure, define the _WIN32_WINNT macro as _WIN32_WINNT_WIN8 or later. For more information, see Using the Windows Headers.

Requirements

See also

File Management Structures

CopyFile2

CopyFile2ProgressRoutine