GetFileType function

Retrieves the file type of the specified file.

Syntax

DWORD GetFileType(
  HANDLE hFile
);

Parameters

hFile

A handle to the file.

Return Value

The function returns one of the following values.

Return code/value Description
FILE_TYPE_CHAR
0x0002
The specified file is a character file, typically an LPT device or a console.
FILE_TYPE_DISK
0x0001
The specified file is a disk file.
FILE_TYPE_PIPE
0x0003
The specified file is a socket, a named pipe, or an anonymous pipe.
FILE_TYPE_REMOTE
0x8000
Unused.
FILE_TYPE_UNKNOWN
0x0000
Either the type of the specified file is unknown, or the function failed.
 

You can distinguish between a "valid" return of FILE_TYPE_UNKNOWN and its return due to a calling error (for example, passing an invalid handle to GetFileType) by calling GetLastError.

If the function worked properly and FILE_TYPE_UNKNOWN was returned, a call to GetLastError will return NO_ERROR.

If the function returned FILE_TYPE_UNKNOWN due to an error in calling GetFileType, GetLastError will return the error code.

Remarks

In Windows 8 and Windows Server 2012, this function is supported by the following technologies.

Technology Supported
Server Message Block (SMB) 3.0 protocol Yes
SMB 3.0 Transparent Failover (TFO) Yes
SMB 3.0 with Scale-out File Shares (SO) Yes
Cluster Shared Volume File System (CsvFS) Yes
Resilient File System (ReFS) Yes

Requirements

   
Minimum supported client Windows XP [desktop apps | UWP apps]
Minimum supported server Windows Server 2003 [desktop apps | UWP apps]
Target Platform Windows
Header fileapi.h (include Windows.h)
Library Kernel32.lib
DLL Kernel32.dll

See Also

File Management Functions

GetFileSize

GetFileTime