下面程序是由鼠标事件在窗体上画图，如果按下鼠标将可以画图，双击窗体可以清除所画图形。补充完整下面的程序。 首先在窗体层定义如下变量： Dim PaintStart As Boolean 编写如下事件过程： Private Sub Form_Load() DrawWidth=2 ForeColor=vbGreen End Sub Private Sub Form_MouseDown(Button As Integer，Shift As Integer，_ X As Single，Y As Single) 【 】 End Sub Private Sub Form_MouseMove(Button As Integer，Shift As Integer，_ X As Single，Y As Single) If PaintStart Then PSet(X，Y) End If End Sub Private Sub Form_MouseUp(Button As Integer，Shift As Integer，_ X As Single，Y As Single) 【 】 End Sub Private Sub Form_Db1Click() 【 】 End Sub
