Well you can just change the pivot placement, but its more complicated than that i tried to make this kind of drag&resize but its little tricky...
Yet i made it
1 - to resize left top corner
2 - to resize right top corner
3 - to resize left bottom corner
4 - to resize right bottom corner
You can make the grabbing detector by adding
"MouseX=>Sprite.Left ^ MouseX=<Sprite.Left+50" & "MouseY=>Sprite.Top ^ MouseY=<Sprite.Top+50" So it will grab the Left Top corner.