"Invalid Handle" error when copying files

Anonymous — Wed, 29 Jan 2003 23:43:50 -0000

Exported from Bugzilla, issue 4098.

--- Comment added on 11/18/02 11:19:13 AM ---
After installation of Internet Explorer 6 on evidently ANY win32 platform (or
if IE6 is the default for the OS, e.g. for WinXP), the SHFileOperation API
starts throwing an error when copying files:

this is propagated out of TStFileOperation and has caused some customer
distress.

To reproduce using the API:

Customer report:
Actually, I was able to reproduce this using straight calls to
SHFileOperation under Visual C++ with the following code:

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
SHFILEOPSTRUCT fileOp;
HRESULT res;

fileOp.hwnd = NULL;
fileOp.wFunc = FO_COPY;

fileOp.pFrom = "E:\\testfile.zip\0\0";
fileOp.pTo = "Z:\\testfile.zip\0\0";

fileOp.fFlags = FOF_ALLOWUNDO | FOF_FILESONLY;

fileOp.hNameMappings = 0;
fileOp.lpszProgressTitle = "Title";

res = SHFileOperation(&fileOp);

res = GetLastError(); // At this point "res" = 6 under IE6

printf("res: %d", res);

return 0;
}

"Stephen Posey [TurboPower Software]" <stephenp@turbopower.com> wrote in
message news:3C471611.F29BEED5@turbopower.com...
> rcf2 wrote:
> >
> > Has anyone had any problems with SysTools implementation of shFileOperation?
> > The problem I am having is that I get an error everytime when copying a file
> > with IE6 installed. After systools calls SHFileOperation() it then calls a
> > routine called CheckSystemError(Res).
> >
> > The CheckSystemError routine checks the result of the SHFileOperation (res).
> > Then if it is 0 it checks GetLastError.
> >
> > procedure TStShellComponent.CheckSystemError(ErrCode : Integer);
> > var
> > Buff : array [0..1023] of Char;
> > begin
> > if ErrCode <> 0 then
> > FError := ErrCode
> > else
> > FError := GetLastError;
> > .......
> >
> > The problem arises when IE6 is installed. For me, on two different machines
> > with IE6, GetLastError returns 6 (The handle is Invalid) when called after a
> > successful SHFileOperation (ie, SHFileOperation() = 0)
> >
> > With the same code under IE5 there is no problem. GetLastError returns 0.
>
> Yup, known problem.
>
> Oddly enough, calling SHFileOperation directly doesn't seem to cause the
> problem; so, presumably, it's somewhere in the TStFileOperation.Execute
> method setup.
>
>
> We're still trying to work out exactly where the difference arises.
>
> Thanks for the report.
>
> Stephen Posey [TurboPower Software]
> --
> Please respond to the newsgroups and not via email.
> This way, everyone benefits from knowing what was said.
> Replies to mailsupport@turbopower.com will be copied back
> to the newsgroup.

-------------------->8 cut here 8<--------------------

Customer John Wargo in a phone conversation says that he's seen reports on the
NET that this error can be addressed by properly zeroing the file name buffers
prior to calling the API.

Recent changes to 32: "Invalid Handle" error when copying files

"Invalid Handle" error when copying files