The correct filename is "steam_api.dll". "PES 2015" is a video game that uses the "steam_api.dll" file for Steam integration.
Steam_api.dll is a DLL file used by many games, including Pro Evolution Soccer 2015, for Steam integration. It is a part of the Steam client application, which provides features such as online game distribution, multiplayer gaming, and social networking services.
The steam_api.dll file allows communication between the game and the Steam client. It manages player profiles, achievements, and other game-related data. If you encounter an error related to steam_api.dll while playing PES 2015, it could indicate a problem with the file itself or with the interaction between the game and the Steam client. In this case, you could try verifying the integrity of the game files through the Steam client or reinstalling the game.