Engine中如何实现先居中显示要素再闪烁

//居中显示要素

IActiveView actView = axMapControl1.ActiveView; 

IEnvelope envelpe = actView.Extent; 

envelpe.CenterAt(pt); 

actView.Extent = envelpe; 

actView.Refresh(); 



//加入强制刷新，保证刷完后再执行其他语句 

actView.ScreenDisplay.UpdateWindow(); 



//调用闪烁代码

IRgbColor rgbColor = new RgbColorClass(); 

rgbColor.RGB = 255; 

FlashGeometry(pt, rgbColor, actView.ScreenDisplay, 500);