Returns values of static system variables.
#define INCL_DOSMISC #include <os2.h> ULONG iStart; /* Ordinal of the first system variable to return. */ ULONG iLast; /* Ordinal of the last system variable to return. */ PVOID pBuf; /* Address of the data buffer where the system returns the variable values. */ ULONG cbBuf; /* Length, in bytes, of the data buffer. */ APIRET ulrc; /* Return Code. */ ulrc = DosQuerySysInfo(iStart, iLast, pBuf, cbBuf);