How to extend c drive without formatting/booting

step 1:)download this partition manager(u can use other partition manager but i m using this.its free!)[download home edition]Code:http://www.partition-tool.com/step 2:)after downloading open up easuse partition master(info:my spacec:=60 gbd:=40 gb)now we will have to get unallocated space.choose a drive which u want to shrink and get unallocated space and add to c drive.[i choose d drive]step 3: