INT 15 - DESQview v2.20+ - SET ERROR HANDLING
AX = DE15h
BL = 00h post system error on all error conditions
01h return carry flag set on calls to ADDTO, SUBFROM, and WRITE
messages sent to mailboxes which fail due to lack of system
or common memory
02h (v2.26+) same as 01h, but return null pointer for GETMEM
calls which fail due to lack of system memory
Return: nothing

See also: 15DE16

15DE15BL00 - DESQview v2.20+ - SET ERROR HANDLING