Each of these walkthroughs details standard ways to extend INTViewer. For the developer getting started with INTViewer, they are also great tutorials.

Adding a contextual menu item to a layer visualization - Steps to add options when performing a right-click on a layer

Running long tasks - Steps to run long tasks without freezing the user interface.

Adding a preferences dialog - Steps to add a preference settings dialog.

Adding a seismic trace processing algorithm / processor - Steps to process traces with proprietary algorithms.

Adding a seismic generator - Steps to process entire datasets with proprietary algorithms

Adding a workflow - Steps to add a logical grouping of tasks, done in a set order to accomplish a specific goal.

Implementing a window - Steps to implement a custom window component

Sending a trace to MATLAB - Steps to send a trace from INTViewer to MATLAB