API -> ReadFile [ Library : kernel32.dll, Category : File Management ] [C#, VB, VB.net]

ReadFile

Library : kernel32.dll Category : File Management

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API Description :

The ReadFile function reads data from a file, starting at the position indicated by the file pointer.

VB Declaration :

Show Multiline Public Private

Declare Function ReadFile Lib "kernel32" (ByVaL hFile As Long, lpBuffer As Any, ByVaL nNumberOfBytesToRead As Long, lpNumberOfBytesRead As Long, lpOverlapped As OVERLAPPED) As Long

Parameters :

· hFile
Identifies the file to be read. The file handle must have been created with GENERIC_READ access to the file.
Windows NT
For asynchronous read operations, hFile can be any handle opened with the FILE_FLAG_OVERLAPPED flag by the CreateFile functi

Return :

If the function succeeds, the return value is nonzero. 

If the return value is nonzero and the number of bytes read is zero, the file pointer was beyond the current end of the file at the time of the read operation. However, if the file was opened with

OS Requirement :

Requires Windows NT 3.1 or later
Requires Windows 95 or later

Dotnet Replacement :

Any of the following: System.IO.FileStream.BeginRead/EndRead System.IO.FileStream.Read System.IO.FileStream.ReadByte