USB modules are supplied with the software, API and source code. Standard software for communication with all USB devices is USBMeasure.exe. USBMeasure software Currently 2 versions of USBMeasure are supported. Standard version and development version. Standard version. It is recommended stable version. It is a windows application which displays the measured values and also log data into a file.You can download standard software + API here.

Extended (development) version.
This version has some new features and it's still beta version. It allows you to view data in graph and also displays the data coming from the USB port. And it  has some additional features. This version requires .Net Framework 2.0 or higher. This is installed by default in Windows Vista and Windows 7. It can also be downloaded from Microsoft site.

You can download extended version of software here.
To test whether the Framework is correctly installed you can use the small tool here.

For software developers are provided API, which is in the installation package USBMeasureBeta.exe. It is a COM object that can be used in your own application. This COM object (USBMeasure.dll) can be used in any known computer languages : C, C++, C# , Visual Basic, Delphi, VB Script....

It performs all operations with USB device. COM object contains a set of functions that communicate with USB devices and also returns the measured value. Creating your own applications using the API is then very simple. Below is source code, that are examples of how to use this library.

During the software installation is COM object automatically registered. Manual registration is not needed.This USBMeasure.dll is common to all USB device : USB Voltmeter , USB Frequency Counter,USB LC Meter and USB Thermometer.

In Visual Studio from Microsoft  is USBMeasure library in Menu :  Project - Add Reference - Table COM - "USMBeasure 1.0 Type Library".

For USB Voltmeter is also created .Net Dll. It is standard .Net Dll and no registration is required. This Dll has the same functions as USBMeasure.dll. It needs .Net Framework 2.0 or higher. This Dll works with all types of USB Voltmeters.

You can download .Net Dll here.

They are simple applications how to use the library. Modification of the code you can create your own application. All examples are based on the COM object that is to be include in the project.

You can download source code here. Help file is here.

All software and API are intended for 32-bit versions of Windows. 64-bit version of Windows is not yet supported.