.TLH File Extension

A .TLH file is a Typelib Generated C/C++ Header File, created by Microsoft.

Open with Microsoft Visual Studio 2022+. Available for Windows.

What is a .TLH file?

The .TLH file extension stands for "Typelib Generated C/C++ Header File." This type of file is a header file created by a Microsoft C/C++ compiler. It includes definitions for interfaces and identifiers that are produced using the #import directive in C/C++ programming. The #import directive is a command used in programming to bring in definitions from a type library, which is a file that stores information about programming objects. This directive helps in using these objects in a C/C++ program.

When you use the #import directive, for example by writing `#import "mylib.tlb"`, it automatically generates two files: a .TLH file and a .TLI file. The .TLH file contains the header information, which includes the declarations of the compiled type library's contents. This file works together with the .TLI file, which contains the implementation of the interfaces declared in the .TLH file. Together, these files help reconstruct the contents of the type library so they can be used in your C/C++ source code.

To open and work with .TLH files, you can use Microsoft Visual Studio 2022 or later versions. Microsoft Visual Studio is a popular development environment that supports many programming languages, including C and C++. It provides tools to edit, debug, and manage code files like .TLH, making it easier to integrate type libraries into your projects.


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