Mouse_event

Does anyone know the correct use of this api call?
mouse_event

Declare Sub mouse_event Lib "user32" Alias "mouse_event" (ByVal dwFlags As Long, ByVal dx As Long, ByVal dy As Long, ByVal cButtons As Long, ByVal dwExtraInfo As Long)

e.g. to move the mouse programmatically:


Public Declare Sub mouse_event Lib "user32" (ByVal dwFlags As Long, ByVal dx As Long, ByVal dy As Long, ByVal cButtons As Long, ByVal dwExtraInfo As Long)
Public Const MOUSEEVENTF_MOVE = &H1

Public Sub MoveMouse(xMove As Long, yMove As Long)


mouse_event MOUSEEVENTF_MOVE, xMove, yMove, 0, 0
End Sub

(sample from planet-source, don't know the author)