Waiting for callbacks from dll on Win32

["Björn Lundin" <bjorn.lundin.nospam@swipnet.se>]

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Hello!
I'm trying to make an interface to a c-dll that
connects to an OPC-server (WTclient.dll)

It wants a pointer to a procedure, which I can provide 
with an access value to a procedure in a protected object.

The problem is, how can I stop the console application and wait for 
callbacks?

I can, by debuging the dll and the opc-server, see that it calls the 
callback procedure, but only sometimes the ada code responds.

I tried establishing the callback, and then have the main task 
hang on a protected entry whose guard is released by the callback, but no 
luck. I also tried having a task watch for the callback, but no luck.
I also dribbeled with having the guard a global varable, in another 
protected object, in the same protected object as the waiting entry, but 
still no luck.

I should say that i get the callbacks occationly, but just about every 
30th time I run the program.

It seems to me that the callback doesn't get cpu-time most of times?  

Lately, i threw in a pragma Interrupt_priority in the protected object, but 
still no luck?

Anyone with suggetions/pointers?
/Bj�rn