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