I have an app that monitors a specific directory. My users print documents to file into that directory (.pcl files). When my program notices a .pcl file in the dir, it tries to convert the .pcl to .pdf.

My problem is that some of the .pcl files are very large and take a while to create. My program notices the file and begins to try to convert even though the printing has not yet finished.

I've tried to check for a file still being created by doing the following:

lhFile = fopen(lcFileName,10)
if lhFile = -1
   Loop
else
   ... do the conversion
endif

However, for some reason this doesn't seem to be catching the fact the the file is still being created.

Any more ideas? Thanks for whatever help you can offer!