SUMMARY

Function 25 returns the interrupt address of the alternate mouse user subroutine identified by the specified call mask. Function 25 may be used prior to a call to Function 24 to retrieve, and later restore, the last alternate interrupt subroutine address.

Input                             Output

AX = 25                           CX = user interrupt call mask
CX = user interrupt call mask     BX:DX = user subroutine address

Mask Bit                          Condition

0                                 Cursor position changes
1                                 Left button pressed
2                                 Left button released
3                                 Right button pressed
4                                 Right button released
5                                 SHIFT key pressed with button
6                                 CTRL key pressed with button
7                                 ALT key pressed with button
8-15                              Not used