Update the sdk from 4.1.3 to 6.2.2 equals dc problems

Hi

After a year I tried to reanimate my garmin watchface. I opened eclipse and made the sdk update. everything worked on 4.1.3. Each available higher sdk equals at

function onLayout(dc as Dc) as Void{ // line 146

function onUpdate(dc as Dc) as Void { // line 204

BUILD: ERROR: C:\Users\xxx\eclipse-workspace\xxx\source\xxxView.mc:146:  Cannot resolve type 'Dc'.
BUILD: ERROR: C:\Users\xxx\eclipse-workspace\xxx\source\xxxView.mc:204:  Cannot resolve type 'Dc'.
BUILD: Complete

What have I missed?

Thanks for every help...