PSD Helps

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 Sample Source Code for a PSD. Some prototypes and macros are defined in PSD.H to simplify their usage.

The following keywords indicate:

May Block Indicates that the help may block.
Won't Block Indicates that the help won't block.