SaveAs additional Options, resolution ???

Hi,

I am trying to convert PDF to JPG. Everything works fine except I can't find any way of setting JPG resolution. In Adobe Acrobat application it is possible by Save As -> (Save as Type: JPEG, Settings Dialog Box -> Resolution) but I can't find any 'Settings' related function/attributes in documentation. I am using Adobe Acrobat XI v11.0.10

Could you suggest how to do this?

Code:

...

VB

JSO.SaveAs outputFilePath, "com.adobe.acrobat.jpeg"

...

...

JS

myDoc.saveAs(filePath, "com.adobe.acrobat.jpeg");

...

SaveAs documentation:

http://help.adobe.com/livedocs/acrobat_sdk/10/Acrobat10_HTMLHelp/wwhelp/wwhimpl/common/htm l/wwhelp.htm?context=Acrobat10_SDK_HTMLHelp&file=JS_API_AcroJS.88.519.html

Regards