对于一个正常的形态，这听起来像你不只是添加System.Windows.Forms的作为参考，
创建对象，然后显示它如。

For a normal form, it sounds like you didn't just add System.Windows.Forms as a reference, create the object then show it eg.

Form myFrm = new frmFlightList();
myFrm.Show();

这应该在VSTO插件工作，因为它以任何其他形式一样。该CMSConnectorControl对象你指的是一种干扰，给他人只是想展示一种形式的一般情况。

This should work in a VSTO addin, as it does in any other form. The CMSConnectorControl object you refer to is a distraction to others for the general case of just wanting to display a form.