form07.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 Form07 
   Caption         =   "演示"
   ClientHeight    =   4080
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5310
   LinkTopic       =   "Form1"
   ScaleHeight     =   4080
   ScaleWidth      =   5310
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "显示"
      Height          =   495
      Left            =   1920
      TabIndex        =   1
      Top             =   3480
      Width           =   1335
   End
   Begin MapObjects2.Map Map1 
      Height          =   3255
      Left            =   0
      TabIndex        =   0
      Top             =   0
      Width           =   5295
      _Version        =   131072
      _ExtentX        =   9340
      _ExtentY        =   5741
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      Contents        =   "form07.frx":0000
   End
End
Attribute VB_Name = "Form07"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'Xuewei,2003/5/7
'在图上画矩形。
Option Explicit
Dim Rect As MapObjects2.Rectangle

Private Sub Command1_Click()
  Dim Dist As Double
  Dim Pt As New MapObjects2.Point
  Set Rect = New MapObjects2.Rectangle
  Dist = 0.2
  Set Pt = Map1.ToMapPoint(2500, 1500)
  Rect.Right = Pt.X + Dist
  Rect.Left = Pt.X - Dist
  Rect.Top = Pt.Y + Dist
  Rect.Bottom = Pt.Y - Dist
  Map1.Refresh
End Sub
 
Private Sub Map1_AfterTrackingLayerDraw(ByVal hDC As stdole.OLE_HANDLE)
  If Not Rect Is Nothing Then
    Dim sym As New Symbol
    sym.SymbolType = moFillSymbol
    sym.Style = 1
    sym.Size = 3
    sym.Color = moBlue
    Map1.DrawShape Rect, sym
  End If
End Sub