There is only one file type that uses the .TLH extension:
Typelib Generated C/C++ Header File
Header file generated by a Microsoft C/C++ compiler; contains definitions of interfaces and identifiers generated by the #import directive; used in conjunction with a .TLI file to reconstruct compiled type library contents for use in C/C++ source code.
NOTE: The #import directive generates both TLH and TLI files. For example, the command #import "mylib.tlb" generates the "mylib.tlh" and "mylib.tli" files from a .TLB file.
|Microsoft Visual Studio||Commercial|
Updated: August 19, 2010