[c-prog] timeout for fopen?

[natebizu]

I have a windows application that needs to open a file that is on a 
network share, but sometimes the user is not connected to the network. 
The problem is fopen takes a REALLY long time to timeout. How do I 
reduce the time it takes for fopen to timeout?

FILE *in = fopen("\\\\share\\drive\\file.txt", "r");
bool fileFound;
if(in)
  fileFound=true;
else
  fileFound=false;