This function installs or removes a specific stream protocol for a stream handler.
#include <os2.h> HID hid; /* Stream handler ID. */ PSPCBKEY pspcbkey; /* SPCB key. */ PSPCB pspcb; /* SPCB address. */ ULONG ulFlags; /* Flags. */ ULONG rc; /* Return codes indicating success or the type of failure: */ rc = SpiInstallProtocol(hid, pspcbkey, pspcb, ulFlags);