'添加一个计时器 Timer1  ，一个图像框 Image1
Option Explicit
Dim dx '定义两个窗体层变量
Dim dy '分别存放X，Y 方向变化增量

Private Sub Form_Load() '初始化
    Timer1.Enabled = True
    Timer1.Interval = 100
    dx = Form1.Width / (Rnd * 150 + 200)
    dy = Form1.Height / (Rnd * 150 + 200)
End Sub

Private Sub Timer1_Timer()
    Image1.Top = Image1.Top + dy '通过改变 top 属性改变高度
    Image1.Left = Image1.Left + dx
    If Image1.Top <= 0 Then dy = -dy '如“碰壁”则变向
    If Image1.Left <= 0 Then dx = -dx
    If Image1.Top >= Form1.Height - Image1.Height Then dy = -dy
    If Image1.Left >= Form1.Width - Image1.Width Then dx = -dx
End Sub

Option Explicit
Dim dx '定义两个窗体层变量
Dim dy '分别存放X，Y 方向变化增量
Private Sub Form_Load() '初始化
 Timer1.Enabled = True
 Timer1.Interval = 10
 dx = Screen.Width / (Rnd * 150 + 200)
 dy = Screen.Height / (Rnd * 150 + 200)
End Sub
Private Sub Image1_Click()
Unload Me
End Sub
Private Sub Timer1_Timer()
 Me.Top = Me.Top + dy '通过改变 top 属性改变高度
 Me.Left = Me.Left + dx
 If Me.Top <= 0 Then dy = -dy '如“碰壁”则变向
 If Me.Left <= 0 Then dx = -dx
 If Me.Top >= Screen.Height - Me.Height Then dy = -dy
 If Me.Left >= Screen.Width - Me.Width Then dx = -dx
End Sub