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Tip of the Day
Language: VB
Expertise: Advanced
Mar 25, 2008



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Make Your Mouse Pointer Tremble

To make your mouse pointer appear to be trembling, you first create a form with ScaleMode = 3 - Pixel. Then use the following code:

Option Explicit
Private Type POINTAPI
    X As Long
    Y As Long
End Type

'Windows API functions to set the cursor position
Private Declare Function SetCursorPos Lib "User32" (ByVal X As Long,_
    ByVal Y As Long) As Long
Private Declare Function ClientToScreen Lib "User32" 
(ByVal hWnd As_ Long, lpPoint As POINTAPI) As Long

Dim lpPoint As POINTAPI

'To get the mouse position at every moment
Private Sub Form_MouseMove(Button As Integer, Shift As Integer,_
X As Single, Y As Single)
    lpPoint.X = X
    lpPoint.Y = Y
End Sub

Private Sub Timer_Timer()
    If lpPoint.X < Form1.ScaleWidth And lpPoint.Y < Form1.ScaleHeight Then
        lpPoint.X = lpPoint.X + Rand(-3, 3)
        lpPoint.Y = lpPoint.Y + Rand(-3, 3)
        ClientToScreen hWnd, lpPoint
        SetCursorPos lpPoint.X, lpPoint.Y
    End If
End Sub

'To create the random value
Function Rand(ByVal Low As Integer, ByVal High As Integer) As Integer
 Rand = ((High - Low) * Rnd) + Low
End Function
Frederico Cebrian
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