INT 15 - DESQview v2.42-2.52 - BUG AH = 12h BH = 17h BL = object 00h DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. on top of stack mailbox, keyboard, or pointer only 02h mailbox for task whose handle is on top of stack 03h mailbox for current task 04h keyboard for task whose handle is on top of stack 05h keyboard for current task Return: STACK popped if handle passed on stack Notes: due to a fencepost error, message 17h is accepted for mailboxes, keyboards, and pointers, but causes a random branch DESQview v2.50-2.52 are distributed as part of DESQview/X v1.02