oci 7.3.4头文件及链接库

You need to include "ociapr.h" and link your programs with ora73.lib.  If you install Oracle using the default directory, here's the location of the files:

c:\orant\oci73\include\ociapr.h

c:\orant\oci73\lib\msvc\ora73.lib OR if you are using Borland C++,
c:\orant\oci73\lib\borland\ora73.lib