Considerations for using the QMF Callable Interface

• A call to QMF returns control to the calling application program only after QMF finishes processing the QMF command.
• QMF is in an inactive state when not processing a call.
• The application program and QMF communicate with return codes and variable data stored in the variable pool or in the interface communications area.
• All QMF commands must be coded in uppercase English letters.

  If you are using a QMF national language feature (NLF), your QMF commands must be written in the NLF language specified as the presiding language, and written in (or folded to) uppercase.

• The maximum length of the passed commands is 256 bytes.

Figure 7 shows how the application passes commands through the callable interface to QMF.

Figure 7. The application uses the QMF callable interface to communicate with QMF.

The results of issuing a command through the callable interface are generally the same as they are if you issue commands interactively.