Tler,
To receive the highest-quality advice, I would suggest posting questions regarding register-level programming in the Driver Development Kit (DDK) forum.
Driver Development Kit (DDK) ForumWith regards to the Reg_Level_Read and Reg_Level_Write functions, they are obsolete. You will want to use the NI Measurement Hardware DDK to develop your register-level programming applications. It is available for download from the following location:
NI Measurement Hardware DDK (Driver Development Kit)The following KnowledgeBase contains detailed i
nformation concerning the NI Measurement Hardware DDK:
Measurement Hardware Driver Development Kit Register Level Programming ArchitectureGood luck with your application.
Spencer S.