How to add my snap-in to MMC

I'm dveloping simple C# application under Windows 7 as an span-in to mmc as in this link

http:开发者_JAVA百科//msdn.microsoft.com/en-us/library/ms692759(VS.85).aspx

After adding the dll to GAC I used installutil.exe to install the snap-in but I couldn't find it in add/remove snap-ins

please help

Make sure you have the [RunInstallerAttribute(true)] declaration at the top of the installer class, and make sure that the installer class is public

IF your App is 32bit then use

mmc /32

else

mmc

if your app is 64bit