Few XML/LUA questions

[Animor]

Hello,

I have few questions I gathered, which I couldn't find answers to. I hope someone here will be able to assist me

1. I want to use local functions properly, in order to save memory.
If I'm declaring a local frame and having all my functions declared as myFrame:myFunc(), will they be local as well? Is it a good practice for saving memory?

2. I want to make a dropdown checkbutton list, which will have only one valid option at a time. Meaning, when I choose an option, the previous option will be unchecked. So I though of doing so using the initialize function, setting the "checked" flag. However, it seems to be updated only when I close and open the dropdown list. Until then, I get more than one option selected. How can I make a dropdown with one selected option which is not closed when selecting an option? I managed do both separately, but not together...

3. The dropdown list has a text that I can set using "UIDropDownMenu_SetText". How can I set the font and font size of this text? I coudn't find any function to do so.

Thanks in advance!