Extension compiler for beginners

MIT App Inventor Help
1

Hello . I'm making a new application for making extensions . This one is made obuesly in appinventor . I'm using a textbox , taifun's clipboard extension and ( thanks , SalmanDev ! ) the open source codes of extensions of SalmanDev , to see how to make the compiler . I know , on the phone will be hard to make extensions , but there is the possibility to connect the phone in WIndows and to test the app with the companion on Mac's . So I'm stucked because I don't know how to :

  • Put next line text in the textbox

  • Create it as simple as possible

  • I have no feedback . If you wish something should be included , please tell !
    This project is exlusively for the community , not for me
    P.S. : You can change the category , I didn't know where to put this topic

Thanks to :

@Taifun for clipboard extension @Salman_Dev for open sourcing his extensions And everyone that will give feedback , that helped me in the community ( even just replied ) and to all the community !