Invalid Handle exception c00000008

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Hi All,

I am trying to create a basic file in Builder c++, however I get a 'Invalid Handle exception c00000008'.

This is the only code I have, behind a button.

C#

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  TFileStream* fs;

  fs = new TFileStream("c:\\test.log", fmCreate);
}

Posted 2-Aug-11 3:47am

User 5474275

Updated 2-Aug-11 5:42am

Uwe Keim

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Maximilien 2-Aug-11 15:40pm

what is fmCreate ?

Chuck O'Toole 2-Aug-11 21:01pm

a constant meaning "create a new file". The documentation on TFileStream is on many sites, here is one: http://www.functionx.com/bcb/fileprocessing/vclfilestream.htm

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Chuck O'Toole · Answer 1 · 2011-08-02T14:57:00

Are you sure the exception occurs on the single line of code you show? This can not be "the only code" you have.

fs, the pointer to the stream is a local variable and hence discarded when this function exits. So, what do you intend to do with the file you just created since you do not return the handle to the file. "Invalid Handle" is a clue that somebody else wants to touch that file.