我认为关键在于：你没有获得安全性认证，即没有数字证书 另外 to dancemaple(枫之舞):好象不是微软的认证，因为我曾经遇到过微软的控件因没有认证而被认为是不安全的。
to qqcxg(爱谁谁) : 怎么获得安全认证呢？
需要数字签名,可以申请一个数字证书,用M$的一个工具加在你要发布的控件上,就可以了.http://ca.pku.edu.cn 可以申请免费的证书. 再去M$下载这个来制作http://msdn.microsoft.com/MSDN-FILES/027/000/219/codesign.exe下边是说明Authenticode for Internet Explorer 5.0 This consists of programs to digitally sign files and programs to check that the files were successfully signed. The programs are: MakeCert—creates a test X.509 certificate. Cert2SPC—creates a test SPC. SignCode—signs a file. ChkTrust—checks the validity of the file. MakeCTL—creates a certificate-trust list. CertMgr—manages certificates, certificate-trust lists, and certificate-revocation lists. SetReg—sets registry keys that control the certificate-verification process. MakeCat—creates a combined catalog of files to avoid multiple trust dialogs. Authenticode for Internet Explorer 5.0
同样的设置，Netants和FlashGet的ActiveX就可以跑
我的就出提示
我的Dll是用Delphi写的，有关系吗？
另外
to dancemaple(枫之舞):好象不是微软的认证，因为我曾经遇到过微软的控件因没有认证而被认为是不安全的。
怎么获得安全认证呢？
再去M$下载这个来制作http://msdn.microsoft.com/MSDN-FILES/027/000/219/codesign.exe下边是说明Authenticode for Internet Explorer 5.0
This consists of programs to digitally sign files and programs to check that the files were successfully signed. The programs are: MakeCert—creates a test X.509 certificate.
Cert2SPC—creates a test SPC.
SignCode—signs a file.
ChkTrust—checks the validity of the file.
MakeCTL—creates a certificate-trust list.
CertMgr—manages certificates, certificate-trust lists, and certificate-revocation lists.
SetReg—sets registry keys that control the certificate-verification process.
MakeCat—creates a combined catalog of files to avoid multiple trust dialogs.
Authenticode for Internet Explorer 5.0
1需要数字签名，否则IE不会下载或提示无签名
2需要实现IObjectSafty接口，否则IE会提示不安全（即使有数字签名），或者在cab中写注册表，若vb的安装程序，见msdn