RIGOL DSG3000 Series - Manual (Page 160)

RIGOL Chapter 4 Programming Demos
4-4 DSG3000 Programming Guide
4. Select Tools in the Microsoft Visual Basic menu bar and click References.
Select VISA Library in the pop-up dialog box and click OK to refer to the VISA Library.
Explanation:
If you cannot find the VISA Library in the left list in the figure above, please try to find it using
the following method.
(1) Make sure that you have installed the NI-VISA library on your PC.
(2) Click Browse… at the right and set the search range to C:\WINDOWS\system32 and
the filename to visa32.dll, as shown in the figure below.