SideScroller Level Editor

I don't know of any specific tutorials for making level editors, but you can find tutorials for other things such as dinput and ddraw that make up the level editor. I just used my basic game loop with some mouse input. Here are the steps I took:

1)Get mouse input from user

2)Get specific "slot", and then save the tile number to the slot in the map array.

3)Take into consideration the worldx and worldy.

4)Draw all the tiles on the screen from the map array.

5)Let the user save or load a map

I made the basic thing in about a day. It is not user friendly, but I'm the only one using it and am fine with it.