First of all, since you are on LF9 and are making a new application, I would highly recommend using the Client Automation Tools (CAT) rather than ImageEnable.  CAT is the new technology that will be supported in the future.  ImageEnable was degraded with the release of SDK 9 and should only be used in LF 8 client environments.

Having stated that, now let's look at the flow of what you want to do.  First we need to start with the understanding that ImageEnable and CAT are tools to interact with the client and are not meant for or supported in a workflow process.  If you are in the LF Client and want to integrate with it, then there are several possible ways to do that but here is the basic flow.

1. Make sure Laserfiche is the window with focus when your app is called.
2. Check if it is the LF Browser window or the Document Viewer window that called your app.
3. Get the selected doc ID(s) and then print

• If it was the LF Browser, use CAT MainWindow methods

1. GetSelectedEntries
2. PrintByID

• If it was the Document Viewer, use CAT DocumentViewer methods

1. Print

In the SDK section of the Old Forums, you can find several posts that demo how to find the LF window with focus.  Here are two good ones:

https://support.laserfiche.com/ForumsFrames.aspx?Link=viewtopic.php%3ft%3d19569%26amp

https://support.laserfiche.com/ForumsFrames.aspx?Link=viewtopic.php%3ft%3d19630%26amp