Writing Transaction Programs
A dynamic link library (DLL) file is provided that handles APPC verbs.
The DLL is reentrant; multiple application processes and threads can call the DLL concurrently.
APPC verbs have a straightforward language interface. Your program fills in fields in a block of memory called a verb control block (VCB). Then it calls the APPC DLL and passes a pointer to the verb control block. When its operation is complete, APPC returns, having used and then modified the fields in the VCB. Your program can then read the returned parameters from the verb control block.
Header Files and Libraries for APPC shows source module usage of supplied header files and libraries needed to compile and link APPC programs. Some of the header files may include other required header files.
| Operating System | Header File | Library | DLL Name |
|---|---|---|---|
| WIN32 | WINAPPC.H | WAPPC32.LIB | WAPPC32.DLL |
| WIN3.1 | WINAPPC.H | WINAPPC.LIB | WINAPPC.DLL |
| OS/2® | APPC_C.H | APPC.LIB | APPC.DLL |
*WIN32 = Windows 2000 and Windows XP
*WIN3.1 = Windows® 3.1 (available only on Communications Server)