The STK Viewer Control Component is a software component that enables you to view and interact with analytical visualizations created with STK. You can use any COM-enabled language, such as Visual C++, Visual C#, Visual Basic, to create the STK Viewer Control component.Using this component, you can:
Follow this link to enter the STK Viewer Control Component library
Note: The opening of two separate vdf files in the same application (process) is not supported.
STK 11.2.1 Programming Interface