This is a 32-bit vs 64-bit mismatch. Ensure your game is the 32-bit version of GTA IV (it is). Redownload XinputEmu from a trusted source – corrupted DLLs cause this error.
: The configuration file that maps your joystick buttons to Xbox 360 buttons. x360ce.exe (Optional) : A GUI tool to configure the mappings visually. Xbox 360 Controller Emulator 2. Installation Steps for GTA IV Obtain the XInputEmu V3.0 files. Locate Game Directory: Find the directory where is installed (e.g., GTA IV - XinputEmu 3.0 -Emulador De Joystick XBox 360 V3.0