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File Services
File Systems
File Management
 GetFileSizeEx Function
GetFileSizeEx Function

Retrieves the size of the specified file.

Syntax

C++ 
BOOL WINAPI GetFileSizeEx(
  __in   HANDLE hFile,
  __out  PLARGE_INTEGER lpFileSize
);

Parameters

hFile [in]

A handle to the file. The handle must have been created with either the GENERIC_READ or GENERIC_WRITE access right or equivalent. For more information, see File Security and Access Rights.

lpFileSize [out]

A pointer to a LARGE_INTEGER structure that receives the file size, in bytes.

Return Value

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

Transacted Operations:  If there is a transaction bound to the file handle, then the function returns information for the isolated file view.

Requirements

Minimum supported client

Windows 2000 Professional

Minimum supported server

Windows 2000 Server

Header

WinBase.h (include Windows.h)

Library

Kernel32.lib

DLL

Kernel32.dll

See Also

File Management Functions
LARGE_INTEGER

 

 

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Build date: 2/4/2010

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vb.net syntax      dmex   |   Edit   |   Show History 
<DllImport("kernel32.dll", SetLastError:=True)> 
Public Shared Function GetFileSizeEx(ByVal hFile As IntPtr, ByRef lpFileSize As LARGE_INTEGER) As Boolean
End Function
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C# syntax      dmex   |   Edit   |   Show History 
[DllImport("kernel32.dll", SetLastError=true)]
internal static extern bool GetFileSizeEx(IntPtr hFile, ref LARGE_INTEGER lpFileSize);
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C# syntax      Thomas Danecker   |   Edit   |   Show History
Int64 should also work:
[DllImport("kernel32.dll", SetLastError=true)]
internal static extern bool GetFileSizeEx(SafeHandle hFile, ref long lpFileSize);
And please always use SafeHandle instead of IntPtr for handles!
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