Allows a process to query its current process code page and the prepared system code pages.
#define INCL_DOSNLS #include <os2.h> ULONG cb; /* The length, in bytes, of arCP. */ PULONG arCP; /* The returned data list. */ PULONG pcCP; APIRET ulrc; /* Return Code. */ ulrc = DosQueryCp(cb, arCP, pcCP);