Create ActiveX in .NET Step By Step
http://www.codeproject.com/KB/cs/CreateActiveXDotNet.aspx
Downloading C# ActiveX components through CAB file.
http://www.codeproject.com/KB/cs/C__Deployment.aspx
Exposing Windows Forms Controls as ActiveX controls
http://www.codeproject.com/KB/miscctrl/exposingdotnetcontrols.aspx
