form0901.frm

VB实验教程源码

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "使用鼠标画图"
   ClientHeight    =   3090
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3090
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.PictureBox Picture1 
      Height          =   2295
      Left            =   1200
      ScaleHeight     =   2235
      ScaleWidth      =   3195
      TabIndex        =   3
      Top             =   360
      Width           =   3255
   End
   Begin VB.Frame Frame1 
      Height          =   2175
      Left            =   120
      TabIndex        =   0
      Top             =   360
      Width           =   855
      Begin VB.CommandButton Command3 
         Caption         =   "清除"
         Height          =   375
         Left            =   120
         TabIndex        =   4
         Top             =   1560
         Width           =   615
      End
      Begin VB.CommandButton Command2 
         Caption         =   "方块"
         Height          =   375
         Left            =   120
         TabIndex        =   2
         Top             =   960
         Width           =   615
      End
      Begin VB.CommandButton Command1 
         Caption         =   "直线"
         Height          =   375
         Left            =   120
         TabIndex        =   1
         Top             =   360
         Width           =   615
      End
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim C1 As Integer
Dim X1 As Integer, Y1 As Integer
Private Sub Command1_Click()
'单击直线按钮
    C1 = 1
End Sub

Private Sub Command3_Click()
'单击清除按钮
    Picture1.Cls
End Sub

Private Sub Command2_Click()
'单击方块按钮
    C1 = 2
End Sub

Private Sub Form_Load()
'装载窗体
    C1 = 0
End Sub

Private Sub Picture1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
'在图片框中按下鼠标键
    If Button = 1 Then
        X1 = X
        Y1 = Y
    End If
End Sub

Private Sub Picture1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
'在图片框中释放鼠标键
    If Button = 1 Then
        Select Case C1
        Case 1
            Picture1.Line (X1, Y1)-(X, Y)
        Case 2
            Picture1.Line (X1, Y1)-(X, Y), , B
        End Select
    End If
End Sub