form01.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 Form01 
   Caption         =   "墨西哥地图"
   ClientHeight    =   5460
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   7590
   LinkTopic       =   "Form1"
   ScaleHeight     =   5460
   ScaleWidth      =   7590
   StartUpPosition =   2  '屏幕中心
   Begin MapObjects2.Map Map2 
      Height          =   1215
      Left            =   120
      TabIndex        =   2
      Top             =   4080
      Width           =   1455
      _Version        =   131072
      _ExtentX        =   2566
      _ExtentY        =   2143
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      Contents        =   "Form01.frx":0000
   End
   Begin VB.Frame Frame1 
      Caption         =   "Frame1"
      Height          =   3615
      Left            =   240
      TabIndex        =   1
      Top             =   120
      Width           =   1095
   End
   Begin MapObjects2.Map Map1 
      Height          =   5175
      Left            =   1680
      TabIndex        =   0
      Top             =   120
      Width           =   5775
      _Version        =   131072
      _ExtentX        =   10186
      _ExtentY        =   9128
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      Contents        =   "Form01.frx":001A
   End
End
Attribute VB_Name = "Form01"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'Xue Wei,2003/5/10
'添加指示窗口

Option Explicit

Private Sub Map1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
  If Button = vbLeftButton Then
    Set Map1.Extent = Map1.TrackRectangle
  ElseIf Button = vbRightButton Then
    Map1.Pan
  End If
End Sub

Private Sub Map1_AfterLayerDraw(ByVal index As Integer, ByVal canceled As Boolean, ByVal hDC As StdOle.OLE_HANDLE)
  If index = 0 Then
    Map2.TrackingLayer.Refresh True
  End If
End Sub

Private Sub Map2_AfterTrackingLayerDraw(ByVal hDC As StdOle.OLE_HANDLE)
  Dim sym As New Symbol
  sym.OutlineColor = moRed
  sym.Style = moTransparentFill
  Map2.DrawShape Map1.Extent, sym
End Sub

Private Sub Form_Load()
  Dim dc As New DataConnection
  Dim layer As MapLayer
  dc.Database = App.Path + "\..\" + "Mexico"
  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("States")
  layer.Symbol.Color = moYellow
  Map1.Layers.Add layer
  Set layer = New MapLayer
  Set layer.GeoDataset = dc.FindGeoDataset("Rivers")
  layer.Symbol.Color = moRed
  'layer.Symbol.Style = 1
  Map1.Layers.Add layer
  Map1.Refresh
  
  Set layer = New MapLayer
  Set layer.GeoDataset = dc.FindGeoDataset("states")
  layer.Symbol.Color = moPaleYellow
  Map2.Layers.Add layer
  Map2.Refresh
End Sub