form03.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 Form03 
   Caption         =   "墨西哥地图"
   ClientHeight    =   4800
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   6540
   LinkTopic       =   "Form1"
   ScaleHeight     =   4800
   ScaleWidth      =   6540
   StartUpPosition =   2  '屏幕中心
   Begin MapObjects2.Map Map1 
      Height          =   4215
      Left            =   360
      TabIndex        =   0
      Top             =   240
      Width           =   5775
      _Version        =   131072
      _ExtentX        =   10186
      _ExtentY        =   7435
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      Contents        =   "Form03.frx":0000
   End
End
Attribute VB_Name = "Form03"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'Xue Wei,2003/5/2
'设置区域、河流、城市的属性。

Option Explicit

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 = moOrange
  layer.Symbol.Size = 1
  layer.Symbol.Style = 2  '对角线填充
  layer.Symbol.OutlineColor = moBrown
  Map1.Layers.Add layer
  
  Set layer = New MapLayer
  Set layer.GeoDataset = dc.FindGeoDataset("Rivers")
  layer.Symbol.Color = moDarkGreen
  layer.Symbol.Size = 2
  'layer.Symbol.Style = 1  '虚线
  Map1.Layers.Add layer
  
  Set layer = New MapLayer
  Set layer.GeoDataset = dc.FindGeoDataset("Cities")
  layer.Symbol.Color = moRed
  layer.Symbol.Size = 5
  layer.Symbol.Style = 2    '三角形符号
  Map1.Layers.Add layer
  Map1.Refresh
End Sub