ctrlAddEventHandler is very useful, but when using in scripts, the only way to pass an arguement into the handler is to create a global variable and return the global variable from inside the handler code. This can cause errors when using the handler multiple times when the global variables are overwritten.
Please can you add the functionality to pass arguements to the ctrlAddEventHandler command
Can you give an example of what you have in mind because I'm pretty sure there is a way to do it, maybe not exactly how you imagined it.
You can use format to get any parameters in, and in draw update the parameter with functions. e.g.
_id = (findDisplay 12 displayCtrl 51) ctrlAddEventHandler ["Draw",format ["
(_this select 0) drawIcon [
'%4', %3, (%1 call FUPCOR), 21, 21, 0, '%2', 2, 0.035, 'TahomaB', 'right'
]
",_pos1,_text,_color,_icon]];