and this worked, at least the message appeared in the log-file.
And I've also used Eclipse (with CDT) to set breakpoints, inspect
variables etc. And I could see my messages in the console.
Here is an example:
I looked ath this statement:
select PZN, EVP, HAP from ABDAcol where PZN IN (1, 2, 3, 456);
and this is what I found in the console:
FUNC-ITEM=[ IN ] args: 5 res=2 type=[IN_FUNC]
FIELD-ITEM[ABDAcol] [PZN]  0 name=<PZN>
INT-ITEM val = 1 res=2 name=<1>
INT-ITEM val = 2 res=2 name=<2>
INT-ITEM val = 3 res=2 name=<3>
INT-ITEM val = 456 res=2 name=<456>
This text was written by my own fprintf()-statements.
hope that helps.