When is it safe to unlock?

[rec]

We are using PDF Converter v3.03 via cdintf.dll in a multi-threaded application and have always used the lpszOutput member of DOCINFO to specify the PDF filename. This has always worked but we are now experimenting with Windows Server 2003 64 and this method doesn't seem to work.

Instead we want to try using Lock/SetDocFileProps/Unlock functions. My question is this: when is it safe to call Unlock? Do we only need to lock until ::StartDoc has been called? Or do we need to wait until the document has been printed and ::EndDoc has been called? Performance is crucial to us, so having to lock for the entire length of the print would be a real problem for us.

Any advice would be welcome.

[rec]

I should of read the manual! You only need to call Unlock if an error occurs printing.

[Joan]

you are right unlock is called only if a problem occurs during printing

In normal workflow the job is unlocked before the Unlock command is called in the code.

Therefore Unlock should be added to the code but it is not called for each print job, it is called only when the print job hands or so.