Destroying files in C

[dariophoenix]

Hi,
I am working in Windows XP and I need to destroy a file in a C program (not just erase its contents). The file was opened this way:

FILE* pBinFile = fopen(nameBinFile,"w+b");

After that, I write data into the file. Finally, I try to destroy it with these instructions:

remove(nameBinFile);
fclose(pBinFile);

But the only effect is erasing the file's contents. How can I destroy it effectively?

[horace1]

try closing the file then removing it, e.g.

fclose(pBinFile );
remove(nameBinF ile);

[dariophoenix]

It worked!! Thanks a lot!!

[Banfa]

If this is a security program, writing data to the file will not destroy the contents it will still be recoverable. You need to make sure you have inerted all the bits of the file several times and then write a random pattern to the file.