simulate plan view with view class

[湖水小浪]

hello everybody
I want to simulate the plan view just like the default view in the autocad software when openning a dwg file.
Now,I can make a 3D view with the view class within .NET API,the 3D view just like the view in Blockview sample.
I don't know how to make a plan view with view class.
Any suggestions?

Thanks,

[湖水小浪]

any idear?