Forms userexits problem

Hi,

I am a newbie here ao if I am posting this to the wrong community please advise.  

Several years ago when converting the Oracle from 8 to 10g along with the old Forms to Forms 6 and the Precompiler to Pro*C/C++, we decided to keep the original userexits ifxtb60.dll as is without recompiling.

Now when I am trying to make the library again I found there is a problem with the for(;;) whenever not found do break situation. The loop just doesn't seemed to be able to break out of the for loop after it reaches the end of the select list as defined by the cursor. I have narrowed down the problem to the C precompiler (precompile prog.pc to prog.c) since if I use the old version prog.c to link a dll my program would be running fine.