how to make "desktop example" with extjs 4.0 beta 3?

sorry if my english bad...

have you try extjs v4.0 beta 3 ?

in the "ext4beta3" folder that I downloaded before, there is desktop sample.

but, when I see the source code, this is what i got:

<script type="text/javascript" src="http://dev.sencha.com/deploy/dev/adapter/ext/ext-bas开发者_如何学JAVAe.js"></script>
<script type="text/javascript" src="http://dev.sencha.com/deploy/dev/ext-all.js"></script>

<script type="text/javascript" src="js/StartMenu.js"></script>
.....
<script type="text/javascript" src="sample.js"></script>

<script type="text/javascript" src="../../builds/ext-all-sandbox.js"></script>
<script type="text/javascript" src="sandbox.js"></script>

why still need ext-base.js? and I cann't find it in the downloaded folder

i just can find ext-core.js, wich looks similar with ext-base.. but when i change it to ext-core.js it shows me error

maybe my big problem is i've been learn extjs 3.x since fews months ago...

and now sencha has issued "extjs v4 beta 3" when I have not proficient with version 3 ..

someone can show me the example how to make desktop sample from pure ext4?? (i mean all from downloaded folder)...

or just a helo word...

sorry if my english bad, i hope you got what i mean...

Not sure about what's in there currently, but I do know that as of beta 3 the desktop example is still very much "in progress" and not yet ready for primetime. It will hopefully be done for the 4.0 final.