FileMaker Scripting for Beginners - Day 1 - What not to do

T*** Script Step 

Show customs dialog 

setting

get (activemodifykey) 

when i attach with a button , with press eighter shift, control, option or common , there number show on customs dialog , if press togather number add , for example shift is 1, control is 4 , option is 8 and command is 16, plus shift  and command make it 17