writing a development environment

[C# Programming]

I need to write a development environment (editor) for writing ladder logic programs for PLCs. This is prt of a larger project. I can find no information anywhere on the net that could possibly point me in the right direction.

If anyone cangive me some direction as to where to look I would greatly appeciate it.

I am developing in C# and that is why I have chosen this forum.

Thanks,

Jim