How to create ICon/Cursor from pdf files

Question

     I was able to create ICon from jpg file without problem but I couldn't create ICon from pdf files.
Here my code:
var myDoc = app.newDoc();
myDoc.importIcon("myIcon"); // it worked when I chose a jpeg image, but it didn't
//when chose a pdf file.
icon = myDoc.getIcon("myIcon");
oIcon = util.iconStreamFromIcon(icon);  
myDoc.closeDoc(true);
app.addToolButton({
               cName: "myButtoon",
               oIcon: oIcon,
               cExec: "app.alert('Someone pressed me!')",
               cTooltext: "Push Me!",
               cEnable: true,     
               nPos: 4
   //app.removeToolButton("myButtoon");
My goal is to create buttons which have icons from a pdf file (stamp) and when user click on these buttons, the cursors become the icon . And then, when user click on the document, the iCon will be showed in the document. The point is: is there anyway to create icons/cursors/stamps from one pdf file. Because the stamp is changeable, when user changes the color/shape of the pdf file, the icons/cursors/stamps will automatically change
What kind of pdf format do I have to use?
I used the sample "SignHere.pdf" in stamps folder of Acrobat but it didn't work.
Thanks.

Answer 1

The SDK has all the information - but certainly there are only samples for those common actions that users have been doing for years.  Most developers don't recreate stuff already present in the application - such as the Stamp plugin - so we don't have samples of such things.
But all the pieces you need are present in the SDK - it's just necessary obvious.  You will need to learn about the details of how the plugin APIs work to create the toolbars and toolbuttons, and then how to handle cursors.  You will then need to learn about PDF details in order to be able to take an existing PDF, potentially modify it (eg. Change the color(s)) and then place it onto another PDF.  
The methods you listed are from JavaScript - there are alternative methods for plugins, such as the AVConversion APIs.