OS/2 provides system services to the PSD developer via PSD helps.
The address of the PSD help router is passed in the INSTALL structure when a PSD's install function is called. All PSD helps destroy the contents of the EAX register (used for a return code). All other registers, including the flags, are preserved.
To invoke a PSD help, set up the appropriate parameters and call the PSD help router. For an example, refer to Appendix A. Some prototypes and macros are defined in PSD.H to simplify their usage.
The following keywords indicate:
May Block