Files to be Included With Your Application

Files for redistribution are installed by the LEADTOOLS setup. For more information on the installation directory structure, refer to Installation Directory.

Legal Notices

Note: You may not copy or redistribute any of the following files without obtaining the proper license. In some cases, the license is included with your initial purchase of LEADTOOLS. In other cases, you must obtain a license from a third party or enter into a royalty agreement with LEAD to obtain the proper license. For these special licensing situations, see the notes below accompanying the specific file.

Note: You may not distribute the header files with your application, and you may not provide software development capabilities in your application.

Required Runtimes

The LEADTOOLS kernel module (for example Leadtools.dll for .NET) is required for applications.

Note:

LEADTOOLS binaries for .NET require the Microsoft Visual C++ 2017 Runtime.
The Microsoft Visual C++ 2017 Redistributable Package cannot be installed on some versions of Windows. For supported versions, see Choosing a Deployment Method and Update for Universal C Runtime in Windows . The Microsoft Visual C++ 2017 Runtime also requires the Windows Universal CRT library, which is distributed as part of Windows 10. For information on how to redistribute the universal CRT, see Introducing the Universal CRT.

Note:

The file names are the same for Win32 and x64. However, the actual binaries are different. For more information about distributing the Microsoft C/C++ runtime files, refer to: https://docs.microsoft.com/en-us/visualstudio/productinfo/2017-redistribution-vs.

Licensing

The License unlocks the features needed for the project. It must be set before any toolkit function is called. The exact function called depends on the platform used. For details (including tutorials for different platforms), refer to Setting a Runtime License.

There are two types of runtime licenses:

Evaluation license, obtained at the time the evaluation toolkit is downloaded. All features are unlocked for evaluation. To download a toolkit, go to Downloads, select the specific toolkit to be evaluated, and register. Registering starts the download. An evaluation license and developer key file are emailed to you by registering.

Deployment license. If a Deployment license file and developer key are required, refer to Obtaining a License.

After the SDK is purchased, the evaluation license can be replaced with a valid runtime license to disable the Nag Message. Nag messages display to remind you about any components that have not been unlocked in the application. This ensures that when redistributing the application it will have all the components it needs in order to run.

For more information about runtime licenses, refer to About LEADTOOLS Deployment Licenses.

DLL Availability

DLLs in the LEADTOOLS Library must be available to the application being developed. DLLs can be made available in one of two ways:

• Install the DLLs in the application's directory.
• Install them in the Global Assembly Cache (GAC). For more information on this method, refer to The Microsoft Gacutil Tool. LEAD Highly recommends against using the Microsoft Global Assembly Cache (GAC)!

NuGet Packages

LEADTOOLS provides .NET developers with NuGet packages support as an additional means for obtaining the latest LEADTOOLS toolkit binaries. For details on the available selection, refer to the following resources:

• LEADTOOLS NuGet Packages - NuGet packages available for download.

• LEADTOOLS NuGet Packages Dependency Tree - Dependency graph of the LEADTOOLS NuGet packages.

Rendering Across Different Platforms

Choosing which draw engine to use in an application depends, in part, on which platforms the application is targeted for deployment:

• If an application will be deployed exclusively to Windows platforms, use DrawEngineType.DefaultEngine. It is based on Windows GDI/GDI+ and produces the fastest rendering.

• If an application will be deployed to both Windows and non-Windows platforms (such as Linux, Android, macOS, iOS, and Universal Windows Platform (UWP)), use DrawEngineType.MultiplatformEngine. This ensures identical rendering across all platforms.

For more information, refer to LEADTOOLS Draw Engine and Multi-Platform Considerations and RasterImage and GDI/GDI+.

The following tables summarize the files that must be included as part of the files distributed with the application. Most files in the tables are optional. These files are referred to as "Redistributables" in the License Agreement.

Redistributable Groups

The following redistributables are grouped together because each member contributes its own portion of the support needed for that functionality.

LEADTOOLS SDK Platform and Application-Specific Redistributables

Individual Application-Specific Redistributables

Deprecated

LEADTOOLS Cloud Services

Does your application require document recognition or conversion, but its implementation language is preventing you from using LEADTOOLS directly? Consider using the LEADTOOLS Cloud Services Web API instead. It is a high-powered and scalable Web API. Its hassle-free interface can be used to integrate advanced OCR, barcode, MICR, and document conversion into any application.

See Also

• Supported Environments
• The latest supported Visual C++ downloads

Related Topics