Redistribution

Virtual USB Tools can be redistributed as part of another product providing the following conditions are met:

• A corresponding license with redistribution rights is obtained by a customer.
• Virtual USB installation package is not modified in any way and is still signed by a valid HHD Software Ltd. digital signature.

To facilitate simpler distribution, separate redistributable packages are provided on the product download page. They support unattended installation and uninstallation and are stripped-down versions of a full installer with the following components removed:

• Configuration Utility
• Command-Line Utility
• Documentation
• API headers and definitions

Installer Command-Line

Unattended Installation

.\virtual-usb-tools-client-redist.exe -silent
# or
.\virtual-usb-tools-server-redist.exe -silent

Unattended Uninstallation

.\virtual-usb-tools-client-redist.exe -silent -u
# or
.\virtual-usb-tools-server-redist.exe -silent -u

A calling process must have “Install Driver” privilege and must be elevated. Installer returns an integer which is zero when successful, equals S_FALSE if successful, but restart is required, or otherwise should be interpreted as HRESULT error code.

License Installation

The library must be activated on the client computer after installation. The user is supposed to activate the library using the license file embedded in the product installer. The license activation is performed with a call to one of the following method:

• IUsbServer.installLicenseFile
• IUsbServer.installLicenseInMemory
• IUsbClient.installLicenseFile
• IUsbClient.installLicenseInMemory

The following scenarios are supported:

• The library is activated by the product installer after installing Virtual USB redistributable package.
• The library is activated when the product is started for the first time.
• The library is activated each time the product is started.

Therefore, it is safe to activate the library multiple times.

Activation is per-user. If the Virtual USB is supposed to be used by multiple Windows users after installation, the product must activate the library for each Windows user.