INT 15 - DESQview v2.20+ - SET ERROR HANDLING AX = DE15h BL = error handling mode 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 also return null pointer for GETMEM calls which fail due to lack of system memory Return: nothing SeeAlso: AX=DE0Ch,AX=DE16h