button for simulating backspace

[Robert Collins]

I am currently working on a "virtual keyboard" in FM for use with a touchscreen . I have all my QWERTY and numerical buttons working but I am having trouble with the backspace button.

I am triggering a script from the button with a Set Field command and have tried various Trim and Replace lines but it doesn't quite work.

this is what I have so far:

Trim(Middle ( Text_field; 1 ; (Length ( Text_field -1 ))))

Any ideas welcome

thanks

[comment]

See if these help:

http://fmforums.com/forum/showtopic.php?tid/184295/

http://fmforums.com/forum/showtopic.php?tid/177438/

[Robert Collins]

Exellent , I had something similar but my -1 on the Length function was on the wrong side of the ()

thanks