using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Text;
using?System.Windows.Forms;

using?ESRI.ArcGIS.Carto;
using?ESRI.ArcGIS.Controls;
using?ESRI.ArcGIS.Display;
using?ESRI.ArcGIS.Geometry;
using?ESRI.ArcGIS.MapControl;
using?ESRI.ArcGIS.ToolbarControl;
using?ESRI.ArcGIS.SystemUI;
using?ESRI.ArcGIS.Output;
using?ESRI.ArcGIS.esriSystem;
using?ESRI.ArcGIS.Geodatabase;
using?ESRI.ArcGIS.DataSourcesGDB;
namespace?VehicleMove
{
????public?partial?class?frmMain?:?Form
????{
????????double?dx?=?116.315691;
????????double?dy?=?39.991964;
????????IActiveView?pactiveview;
????????public?frmMain（）
????????{
????????????InitializeComponent（）;
????????????//
????????????timer1.Enabled?=?false;
????????????timer2.Enabled?=?false;
????????????timer3.Enabled?=?false;
????????????timer4.Enabled?=?false;
????????????timer5.Enabled?=?false;
????????????//
????????????this.axToolbarControl1.SetBuddyControl（this.axMapControl1）;
????????????pactiveview?=?this.axMapControl1.ActiveView;
????????}
????????//方法1：缺點：有拖尾除非每次刷新，但是刷新會出現不停閃爍???
????????private?void?timer1_Tick（object?sender?EventArgs?e）
????????{
????????????dx?=?dx?+?0.001;
????????????dy?=?dy?-?0.0001;
????????????MoveCar（）;
????????}
????????private?void?MoveCar（）
????????{
????????????//得到當前活動范圍

????????????IActiveView?pActiveView?=?axMapControl1.ActiveView;
????????????//開始畫筆?
????????????pActiveView.ScreenDisplay.StartDrawing（pActiveView.ScreenDisplay.hDC?（short）esriScreenCache.esriNoScreenCache）;
????????????IPoint?ppoint;
????????????IGeometry?pgeo;
????????????IPictureMarkerSymbol?psymbol?=?new?PictureMarkerSymbolClass（）;
????????????IRgbColor?prgbcolor?=?new?RgbColorClass（）;
????????????prgbcolor.Red?=?0;
????????????prgbcolor.Green?=?0;
????????????prgbcolor.Blue?=?0;

????????????psymbol.BitmapTransparencyColor??=?prgbcolor;
????????????psymbol.CreateMarkerSymbolFromFile（esriIPictureType.esriIPictureBitmap@“E:\layers\2.bmp“）;
????????????psymbol.Size?=?15;
????????????psymbol.Angle?=?270;

????????????//ISimpleMarkerSymbol?psimplesymbol?=?new?SimpleMarkerSymbolClass（）;
????????????//psimplesymbol.Size?=?10;
????????????//psimplesymbol.Color?=?（IColor）prgbcolor;

????????????ppoint?=?new?PointClass（）;
????????????ppoint.PutCoords（dxdy）;
????????????pgeo?=?ppoint;

????????????pActiveView.ScreenDisplay.SetSymbol（（ISymbol）psymbol）;
????????????pActiveView.ScreenDisplay.DrawPoint（ppoint）;
????????????//結束畫筆
????????????pActiveView.ScreenDisplay.UpdateWindow（）;
????????????pActiveView.ScreenDisplay.FinishDrawing（）;
????????????//System.object?obj?=?psymbol;
????????????//this.axMapControl1.DrawShape（pgeo?ref?obj）;
?????????
????????????//this.axMapControl1.CenterAt（ppoint）;
????????????IEnvelope?penv?=?this.axMapControl1.Extent;
????????????penv.CenterAt（ppoint）;
????????????this.axMapControl1.Extent?=?penv;
????????}
????????pr