form02.frm

给出了详细的vb环境下mo基本功能的代码 如图层的加载

VERSION 5.00
Object = "{9BD6A640-CE75-11D1-AF04-204C4F4F5020}#2.0#0"; "mo20.ocx"
Begin VB.Form Form02 
   Caption         =   "世界地图"
   ClientHeight    =   4605
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5295
   LinkTopic       =   "Form1"
   ScaleHeight     =   4605
   ScaleWidth      =   5295
   StartUpPosition =   2  '屏幕中心
   Begin VB.TextBox Text1 
      Height          =   375
      Left            =   4200
      TabIndex        =   4
      Text            =   "Text1"
      Top             =   4080
      Width           =   855
   End
   Begin VB.CommandButton Command2 
      Caption         =   "Command2"
      Height          =   495
      Left            =   2400
      TabIndex        =   3
      Top             =   4080
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   495
      Left            =   720
      TabIndex        =   2
      Top             =   4080
      Width           =   1335
   End
   Begin MapObjects2.Map Map1 
      Height          =   3375
      Left            =   120
      TabIndex        =   0
      Top             =   120
      Width           =   5055
      _Version        =   131072
      _ExtentX        =   8916
      _ExtentY        =   5953
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      Contents        =   "Form02.frx":0000
   End
   Begin VB.Label Label1 
      Caption         =   "Label1"
      Height          =   255
      Left            =   120
      TabIndex        =   1
      Top             =   3720
      Width           =   5055
   End
End
Attribute VB_Name = "Form02"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'Xue Wei,2003/6/10
'点击地图ScaleX演示；

Option Explicit

Private Sub Command1_Click()
  Me.ScaleMode = Text1
  Label1.Caption = "目前单位：" & Me.ScaleMode
End Sub

Private Sub Command2_Click()
  Me.ScaleMode = vbTwips
  Label1.Caption = "目前单位：" & Me.ScaleMode
End Sub

Private Sub Form_Load()
  DrawLayer   '加载世界地图中的Country图层；
  Text1 = 2
  Command1.Caption = "设定单位"
  Command2.Caption = "原始单位"
  Label1.Caption = "点击地图显示单位。"
End Sub

Private Sub Map1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
  Label1.Caption = "X坐标：" & Me.ScaleX(X, vbTwips, Me.ScaleMode) & _
  " ，Y坐标1：" & Me.ScaleY(Y, vbTwips, Me.ScaleMode) & " ，Y坐标2：" & Me.ScaleX(Y, vbTwips, Me.ScaleMode)
End Sub

Sub DrawLayer()
  Dim dc As New DataConnection
  Dim layer As MapLayer
  
  dc.Database = App.Path + "\..\" + "world"
  If Not dc.Connect Then
    MsgBox "在指定的文件夹下没找到图层数据文件！"
    End
  End If
  
  Set layer = New MapLayer
  Set layer.GeoDataset = dc.FindGeoDataset("country")
  layer.Symbol.Color = moLimeGreen
  Map1.Layers.Add layer
End Sub