Invoke an Infopath form with C#

[Ana]

Hi,
I have a primary form and i want to call another form by clicking in a
button. It´s not a submitt button. It´s done in java script but now the
project is to be done in C# and I don´t know much about it but I'm learning.
Can anyone help me?

In the other project I was doing this:

objInfoApp = new ActiveXObject("InfoPath.Application");

Thanks.