Windows 7: .Net grid winform help

I am struggling with a complex API that is very slow as a solution to my .Net Grid winform application. So I need a high performance grid that would help my .Net Grid winform application.

I am answering this question because i FELL IT IS STILL RELEVANT.
I have tried other solutions out there until I came across Dapfor’s .Net Grid. It was superbly fast and does not consume your memory space. The user interface is also quite simple. It would not be difficult for you to use. Many other solutions exist out there but I singled Dapfor’s out because it suits my needs. Hope that helps.