Specifications

Appendix C - TAPI Function Reference CARROLL TOUCH
C-8 Touch System Programmer’s Guide
GetUserEventHandlerParameters (8)
Description
This function returns the parameters associated with the user event
handler.
Call with
AX = 8 (function number).
Returns
AX = 8 (function number).
BH = Event mask.
Bit 0= If 1, handler is called on all coordinate reports.
Bit 1= If 1, handler is called on all non-coordinate
reports.
The Touch Coordinate Report (report header = FEH), Add
Exit Point Coordinate Report (report header = FDH),
Non-Contiguous Coordinate Report (report header = FCH),
and Scan Report (report header = FBH) are all classified as
coordinate reports, and are enabled if bit 0 of the event mask
is set. All other reports are classified as non-coordinate
reports, and are enabled if bit 1 of the event mask is set. If the
user event handler is enabled for all reports, both event mask
bits are set.
BL = Enable bits.
Bit 0= If 1, event handler calls are enabled.
If 0, event handler calls are disabled.
CX = Segment address of user event handler.
DX = Offset address of user event handler.
BH: X X
7 6 5 4 3 2 1 0
BH: X
7 6 5 4 3 2 1 0