Action name: OpenTypeLibrariesThis command opens the type libraries window. Here the user can load and unload standard type libraries.
The standard type libraries contain type definitions from the standard C header supplied with compilers. Usually, IDA tries to determine the target compiler and its type libraries automatically but if it fails, this window allows you to load the appropriate type library.
Furthermore, don't forget to specify the compiler and memory model in the compiler setup dialog box.
See also View|Open subviews submenu.