To use the driver with Visual Basic 4.0, 5.0 or 6.0 (for 32-bit applications), the user must include the GTDIO32.BAS32 to the project. For Visual Basic .NET use the GTDIO32.VB.
The file can be loaded using Add File from the Visual Basic File menu. The GTDIO32.BAS/ GTDIO32.VB contain function declarations for the DLL driver.