Creates or opens a file or other device
#include <WinAPIFiles.au3>
_WinAPI_CreateFile ( $sFileName, $iCreation [, $iAccess = 4 [, $iShare = 0 [, $iAttributes = 0 [, $tSecurity = 0]]]] )
| $sFileName | Name of an object to create or open |
| $iCreation | Action to take on files that exist and do not exist: 0 - Creates a new file. The function fails if the file exists 1 - Creates a new file. If a file exists, it is overwritten 2 - Opens a file. The function fails if the file does not exist 3 - Opens a file. If the file does not exist, the function creates the file 4 - Opens a file and truncates it so that its size is 0 bytes. The function fails if the file does not exist. |
| $iAccess | [optional] Access to the object: 1 - Execute 2 - Read 4 - Write |
| $iShare | [optional] Sharing mode of an object: 1 - Delete 2 - Read 4 - Write |
| $iAttributes | [optional] The file attributes: 1 - File should be archived 2 - File is hidden 4 - File is read only 8 - File is part of or used exclusively by an operating system. |
| $tSecurity | [optional] a $tagSECURITY_ATTRIBUTES structure or a pointer to it that determines if the returned handle can be inherited by child processes. If $tSecurity is 0, the handle cannot be inherited. |
| Success: | The open handle to a specified file |
| Failure: | 0, call _WinAPI_GetLastError() to get extended error information |
$tagSECURITY_ATTRIBUTES, _WinAPI_CloseHandle, _WinAPI_FlushFileBuffers, _WinAPI_GetFileSizeEx, _WinAPI_ReadFile, _WinAPI_SetEndOfFile, _WinAPI_SetFilePointer, _WinAPI_WriteFile
Search CreateFile in MSDN Library.
#include <WinAPIFiles.au3>
#include <WinAPIHObj.au3>
Local $sTempFile, $hFile, $sText, $nBytes, $tBuffer, $iSize
; 1) create file and write data to it
$sTempFile = @TempDir & '\test.txt'
$sText = 'abcdefghijklmnopqrstuvwxyz'
$tBuffer = DllStructCreate("byte[" & StringLen($sText) & "]")
DllStructSetData($tBuffer, 1, $sText)
$hFile = _WinAPI_CreateFile($sTempFile, 1)
_WinAPI_WriteFile($hFile, $tBuffer, StringLen($sText), $nBytes)
$iSize = _WinAPI_GetFileSizeEx($hFile)
_WinAPI_CloseHandle($hFile)
ConsoleWrite('1):' & $iSize & ' ' & FileRead($sTempFile) & @CRLF)
; 2) read 6 bytes from position 3
$tBuffer = DllStructCreate("byte[6]")
$hFile = _WinAPI_CreateFile($sTempFile, 2, 2)
$iSize = _WinAPI_GetFileSizeEx($hFile)
_WinAPI_SetFilePointer($hFile, 3)
_WinAPI_ReadFile($hFile, $tBuffer, 6, $nBytes)
_WinAPI_CloseHandle($hFile)
$sText = BinaryToString(DllStructGetData($tBuffer, 1))
ConsoleWrite('2):' & $iSize & ' ' & $sText & @CRLF)
; 3) write previously read 6 bytes from position 3 to the same position but in UpperCase
DllStructSetData($tBuffer, 1, StringUpper($sText))
$hFile = _WinAPI_CreateFile($sTempFile, 2, 4)
$iSize = _WinAPI_GetFileSizeEx($hFile)
_WinAPI_SetFilePointer($hFile, 3)
_WinAPI_WriteFile($hFile, $tBuffer, 6, $nBytes)
_WinAPI_CloseHandle($hFile)
$tBuffer = 0
ConsoleWrite('3):' & $iSize & ' ' & FileRead($sTempFile) & @CRLF)
; 4) truncate file size to 12 bytes
$hFile = _WinAPI_CreateFile($sTempFile, 2, 4)
_WinAPI_SetFilePointer($hFile, 12)
_WinAPI_SetEndOfFile($hFile)
$iSize = _WinAPI_GetFileSizeEx($hFile)
_WinAPI_CloseHandle($hFile)
ConsoleWrite('4):' & $iSize & ' ' & FileRead($sTempFile) & @CRLF)
FileDelete($sTempFile)