How to Fly a helicopter with a keyboard in GTA IV

Use mouse and keyboards to play this game. To move the camera, press and hold the right mouse button. Moving mouse freely moves the helicopter. Acceleration is set in (W) button in keyboard. To slowdown press (S). Rotating left is set in (CTRL) and right in (ALT). Use (CTRL+ALT) to power fly. Pitching backwards and forwards is also set in the mouse. Holding space bar gives you another angle. Using the controls the helicopter can be flied through narrow ways, broad-ways etc. Firing is set in space button in keyboard and right mouse button. Only correct use of these two buttons will result in the success.