Informix_ESQL/C in Windows NT environment

Hi, I don't know, if hier the right place for my question is. Nevertheless I try it. I must write esqlc applications for an Informix-dbase in a NT-Server. I'm using Microsoft Visual C++ and InformixSDK local on my computer wit Windows95 as OS. I can precompile the ec-file and make a c-file of it, then compile the c-file and make an exe-file. But wenn I run this exe-file, the programm crash at the first call of a esql-function like 'rtoday' in the Programm. Does anyone know hier which library or DLL of esql (or Informix) I should set in Visual C++, so that the programm can find the function in library and run. Thanx Kia