GetFileSizeEx function
Applies to: desktop apps only
Retrieves the size of the specified file.
Syntax
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.
Metro style apps: GetFileSizeEx is not supported. Use GetFileInformationByHandleEx.
Requirements
|
Minimum supported client | Windows XP |
|---|---|
|
Minimum supported server | Windows Server 2003 |
|
Header |
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|
Library |
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DLL |
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See also
Send comments about this topic to Microsoft
Build date: 4/17/2012
Visual C++ 6 syntax
typedef BOOL (WINAPI *GETFILESIZEEX)(HANDLE, PLARGE_INTEGER);
GETFILESIZEEX GetFileSizeEx;
------------------------------------------------------
__int64 ReturnData;
LARGE_INTEGER DataTemp;
HMODULE TheKernel32 = ::GetModuleHandleW(L"kernel32.dll");
if(TheKernel32 == NULL)
{
TheKernel32 = ::LoadLibraryW(L"kernel32.dll");
}
if(TheKernel32 != NULL)
{
GetFileSizeEx = (GETFILESIZEEX)::GetProcAddress(TheKernel32, "GetFileSizeEx");
if(GetFileSizeEx != NULL)
{
if(::GetFileSizeEx(FileCode, &DataTemp) != 0) //檢查是否成功取得
{
ReturnData = DataTemp.QuadPart;
}else{
ReturnData = -1;
}
}else{
//error
ReturnData = -1;
}
::FreeLibrary(TheKernel32); //釋放Library
}
GETFILESIZEEX GetFileSizeEx;
------------------------------------------------------
__int64 ReturnData;
LARGE_INTEGER DataTemp;
HMODULE TheKernel32 = ::GetModuleHandleW(L"kernel32.dll");
if(TheKernel32 == NULL)
{
TheKernel32 = ::LoadLibraryW(L"kernel32.dll");
}
if(TheKernel32 != NULL)
{
GetFileSizeEx = (GETFILESIZEEX)::GetProcAddress(TheKernel32, "GetFileSizeEx");
if(GetFileSizeEx != NULL)
{
if(::GetFileSizeEx(FileCode, &DataTemp) != 0) //檢查是否成功取得
{
ReturnData = DataTemp.QuadPart;
}else{
ReturnData = -1;
}
}else{
//error
ReturnData = -1;
}
::FreeLibrary(TheKernel32); //釋放Library
}
C# syntax
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!
- 8/24/2009
- Thomas Danecker
- 8/24/2009
- Thomas Danecker
vb.net syntax
<DllImport("kernel32.dll", SetLastError:=True)>
Public Shared Function GetFileSizeEx(ByVal hFile As IntPtr, ByRef lpFileSize As LARGE_INTEGER) As Boolean
End Function
