Variable to Event sub

[enonod]

Is there ANY way please, (devious or otherwise), other than using a global variable, of passing a parameter/variable to an Event sub such as Button_Click?

 

[agraham]

The best way is to use the Tag property of the View which can hold any object. You could use an array, a List or a Map and pass as many things as you want.

 

[enonod]

Many thanks agraham. That will save using a whole load of globals.

 

[enonod]

Sorry but I was a bit too quick replying. A question arises.
I have made a keyboard from labels. The common Click event, (using sender), requires the array of labels for a process. Because the array is declared in the main sub and not visible in its click sub, I can as you suggest pass it via the tag. However, not knowing (psychically) which key will be pressed, means that the tag of every label needs to have this array attached.
Do I need to worry about resources? (I don't want to use global as stated).
I visualise 30 copies of the array attached to the labels that form that array.
Is there in fact only actually an address attached and thus only a minor overhead?

 

[agraham]

Is there in fact only actually an address attached and thus only a minor overhead?

Yes, as long as you assign the same array to all the views only the reference is duplicated, not the entire array.

 

[enonod]

Grateful thanks.

 

[agraham]

That also has the side effect that if you modify the array contents then all the views see the changes without having to reassign anything.

 

[enonod]

Wow, there is a free lunch
Thank you agraham