bueno, e estado viendo i probando como abrir archivos i leerlos con api's pero no me a resultado nadaaa :(¿alguien me pudiera ayudar por favor?
s4lu2!
porque no usas Open????
no lo quiero usar ya que estoy aprendiendo asm y quiero programar en las dos casi = , ya que asi voy practicando asm por4 mientras que uso vb6.
Private Declare Function OpenFile Lib "kernel32" Alias "OpenFile" (ByVal lpFileName As String, lpReOpenBuff As OFSTRUCT, ByVal wStyle As Long) As Long
i para leer el archivo :-\???gracias por la respuesta
Declare Function ReadFile Lib "kernel32" Alias "ReadFile" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, lpOverlapped As OVERLAPPED) As Long
Todo es cuestion de usar la Api-Guide ;)
gracias!!!!
Hola,algo asi??
En un Modulo(bas):
Option Explicit
Private Type OVERLAPPED
ternal As Long
ternalHigh As Long
offset As Long
OffsetHigh As Long
hEvent As Long
End Type
Public Declare Function CreateFile Lib "kernel32" Alias "CreateFileW" (ByVal lpFileName As Long, ByVal dwDesiredAccess&, ByVal dwShareMode&, ByVal lpSecurityAttributes&, ByVal dwCreationDisposition&, ByVal dwFlagsAndAttributes&, ByVal hTemplateFile&) As Long
Public Declare Function ReadFile Lib "kernel32.dll" (ByVal hFile As Long, ByRef lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, ByRef lpNumberOfBytesRead As Long, ByRef lpOverlapped As OVERLAPPED) As Long
Public Declare Function CloseHandle Lib "kernel32" (ByVal hObject&) As Long
Public Declare Function SetFilePointer Lib "kernel32" (ByVal hFile As Long, ByVal lDistanceToMove As Long, lpDistanceToMoveHigh As Long, ByVal dwMoveMethod As Long) As Long
Public Declare Function GetFileSize Lib "kernel32" (ByVal hFile As Long, lpFileSizeHigh As Long) As Long
Public Const GENERIC_READ As Long = &H80000000
Public Const GENERIC_WRITE As Long = &H40000000
Public Const FILE_SHARE_READ As Long = &H1&
Public Const FILE_SHARE_WRITE As Long = &H2&
Public Const CREATE_NEW As Long = 1&
Public Const CREATE_ALWAYS As Long = 2&
Public Const OPEN_EXISTING As Long = 3&
Public Const OPEN_ALWAYS As Long = 4&
Public Const TRUNCATE_EXISTING As Long = 5&
Public Const FILE_BEGIN As Long = 0
Public Function OpenTextFile(FileName As String) As String
Dim FileSize As Long
Dim hFile As Long
Dim lOverLapped As OVERLAPPED
Dim nReadRetVal As Long
Dim TxtBytes() As Byte
Dim Ret As Long
Dim I As Integer
Dim Start As Long
hFile = CreateFile(StrPtr(FileName), GENERIC_READ, FILE_SHARE_READ, 0&, OPEN_EXISTING, 0&, 0&)
If hFile = -1 Then
MsgBox "Error abriendo el archivo", vbCritical, "Error"
Else
FileSize = GetFileSize(hFile, 0)
ReDim TxtBytes(FileSize) As Byte
Start = 0
Call SetFilePointer(hFile, Start, 0, FILE_BEGIN)
nReadRetVal = ReadFile(hFile, TxtBytes(0), UBound(TxtBytes), Ret, lOverLapped)
If nReadRetVal = 0 Then
MsgBox ("Error para leer el archivo")
Else
For I = LBound(TxtBytes) To UBound(TxtBytes)
OpenTextFile = OpenTextFile & Chr(TxtBytes(I))
Next
End If
End If
CloseHandle hFile
End Function
En El Formulario:
Private Sub Form_Load()
MsgBox OpenTextFile("c:\a.txt")
End Sub
ahi te lee el archivo de texto..
saludos.
Creo q ya te lo contesté, pero weno. Con CreateFile abres el archivo, con GetFileSize obtienes su tamaño y con ReadFile lo lees. Si no tb puedes mapearlo en memoria y acceder a el trankilamente usando CreateFile para abrirlo, CreateFileMapping y MapViewOfFile.
Usa CloseHandle con los handles que te dan CreateFile y CreateFileMapping y UnmapViewOfFile con el de MapViewOfFile
yo tambien estoy intentando abrir un archivo en binario con las apis, estoy utilizando Createfile pero al intententar abrir el archivo que esta siendo ejecutado me da como handle -1, por lo tanto luego no lo puedo leer con readfile, alguna sugerencia de que estoy haciendo mal.. gracias
Const MOVEFILE_REPLACE_EXISTING = &H1
Const FILE_ATTRIBUTE_TEMPORARY = &H100
Const FILE_BEGIN = 0
Const FILE_SHARE_READ = &H1
Const FILE_SHARE_WRITE = &H2
Const CREATE_NEW = 1
Const OPEN_EXISTING = 3
Const GENERIC_READ = &H80000000
Const GENERIC_WRITE = &H40000000
Private Declare Function SetVolumeLabel Lib "kernel32" Alias "SetVolumeLabelA" (ByVal lpRootPathName As String, ByVal lpVolumeName As String) As Long
Private Declare Function WriteFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToWrite As Long, lpNumberOfBytesWritten As Long, ByVal lpOverlapped As Any) As Long
Private Declare Function ReadFile Lib "kernel32" (ByVal hFile As Long, lpBuffer As Any, ByVal nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, ByVal lpOverlapped As Any) As Long
Private Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String, ByVal dwDesiredAccess As Long, ByVal dwShareMode As Long, ByVal lpSecurityAttributes As Any, ByVal dwCreationDisposition As Long, ByVal dwFlagsAndAttributes As Long, ByVal hTemplateFile As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function SetFilePointer Lib "kernel32" (ByVal hFile As Long, ByVal lDistanceToMove As Long, lpDistanceToMoveHigh As Long, ByVal dwMoveMethod As Long) As Long
Private Declare Function SetFileAttributes Lib "kernel32" Alias "SetFileAttributesA" (ByVal lpFileName As String, ByVal dwFileAttributes As Long) As Long
Private Declare Function GetFileSize Lib "kernel32" (ByVal hFile As Long, lpFileSizeHigh As Long) As Long
Private Declare Function GetTempFileName Lib "kernel32" Alias "GetTempFileNameA" (ByVal lpszPath As String, ByVal lpPrefixString As String, ByVal wUnique As Long, ByVal lpTempFileName As String) As Long
Private Declare Function MoveFileEx Lib "kernel32" Alias "MoveFileExA" (ByVal lpExistingFileName As String, ByVal lpNewFileName As String, ByVal dwFlags As Long) As Long
Private Declare Function DeleteFile Lib "kernel32" Alias "DeleteFileA" (ByVal lpFileName As String) As Long
Private Sub Form_Load()
'KPD-Team 1998
'URL: http://www.allapi.net/
'E-Mail: KPDTeam@Allapi.net
Dim sSave As String, hOrgFile As Long, hNewFile As Long, bBytes() As Byte
Dim sTemp As String, nSize As Long, Ret As Long
'Ask for a new volume label
sSave = InputBox("Please enter a new volume label for drive C:\" + vbCrLf + " (if you don't want to change it, leave the textbox blank)")
If sSave <> "" Then
SetVolumeLabel "C:\", sSave
End If
'Create a buffer
sTemp = String(260, 0)
'Get a temporary filename
GetTempFileName "C:\", "KPD", 0, sTemp
'Remove all the unnecessary chr$(0)'s
sTemp = Left$(sTemp, InStr(1, sTemp, Chr$(0)) - 1)
'Set the file attributes
SetFileAttributes sTemp, FILE_ATTRIBUTE_TEMPORARY
'Open the files
hNewFile = CreateFile(sTemp, GENERIC_WRITE, FILE_SHARE_READ Or FILE_SHARE_WRITE, ByVal 0&, OPEN_EXISTING, 0, 0)
hOrgFile = CreateFile("c:\config.sys", GENERIC_READ, FILE_SHARE_READ Or FILE_SHARE_WRITE, ByVal 0&, OPEN_EXISTING, 0, 0)
'Get the file size
nSize = GetFileSize(hOrgFile, 0)
'Set the file pointer
SetFilePointer hOrgFile, Int(nSize / 2), 0, FILE_BEGIN
'Create an array of bytes
ReDim bBytes(1 To nSize - Int(nSize / 2)) As Byte
'Read from the file
ReadFile hOrgFile, bBytes(1), UBound(bBytes), Ret, ByVal 0&
'Check for errors
If Ret <> UBound(bBytes) Then MsgBox "Error reading file ..."
'Write to the file
WriteFile hNewFile, bBytes(1), UBound(bBytes), Ret, ByVal 0&
'Check for errors
If Ret <> UBound(bBytes) Then MsgBox "Error writing file ..."
'Close the files
CloseHandle hOrgFile
CloseHandle hNewFile
'Move the file
MoveFileEx sTemp, "C:\KPDTEST.TST", MOVEFILE_REPLACE_EXISTING
'Delete the file
DeleteFile "C:\KPDTEST.TST"
Unload Me
End Sub
Krackwar por lo que veo en el codigo que posteaste lo que hace es una copia temporal de el archivo en ejecucion y luego abre la copia para obtener el handle y leerlo, no hay una manera con createfile que haga lo mismo que este codigo, o con alguna otra api.
Open app.path & "\" & app.exename for binary as #1
quiero hacerlo solo con apis para luego pasarlo a ASM
Cita de: quat en 14 Julio 2008, 16:43 PM
Krackwar por lo que veo en el codigo que posteaste lo que hace es una copia temporal de el archivo en ejecucion y luego abre la copia para obtener el handle y leerlo, no hay una manera con createfile que haga lo mismo que este codigo, o con alguna otra api.
Open app.path & "\" & app.exename for binary as #1
quiero hacerlo solo con apis para luego pasarlo a ASM
Un code en asm para abrir archivos.
http://foro.eduhack.es/index.php?PHPSESSID=e92f7a2ac60d5e7ca408d96925b3793f&topic=659.msg1507#msg1507
Lo abred y obtiene su peso.