mouseWheel

mouseWheel(n)

mouseWheel(n, modifierState)

This function performs a mouse wheel operation, emulating rotation of the vertical wheel of a mouse. The operation happens over the current mouse location. To move the mouse to a desired location, please use the function mouseMove(x, y).

The amount of wheel rotation is specified by the argument n. One n corresponds to one wheel notch which is about 15 degrees or 120 delta units of a mouse wheel event. The positive value of n rotates the wheel in an upward direction (away from the user) and the negative in a downward direction (toward the user).

The keyboard state during a mouse wheel can be specified by using the argument modifierState. See Windows Convenience Function Parameters for which values are valid for this argument.