If you are doing this in an Activity and don't mind using Java Steps; you can use code like this:

String PropertyName=tools.getParamValue("PropertyName");
String PropertyValue=tools.getParamValue("PropertyValue");
myStepPage.putString( PropertyName, PropertyValue );

I have a set of properties including 'title' and 'city' here; and using different parameters to my Activity the code above will set the appropriate property:

Here's the Parameter Tab for my Activity:

And the Steps - just a Page-New , the Java Steps (the code already pasted above), and a Show-Page:

For completeness here's the Pages & Classes tab, change this for your class structure of course:

And when I run this with the Parameter set to 'Title' :

The Show-Page confirms the '.Title' property is set:

<pagedata>
<pxObjClass>GCS-GCSApp-Work</pxObjClass>
<Title>Hello</Title>
<pzStatus>valid</pzStatus>
</pagedata>

If I run it again with 'PropertyName' set to 'City', it changes to this:

<pagedata>
<pxObjClass>GCS-GCSApp-Work</pxObjClass>
<City>Hello</City>
<pzStatus>valid</pzStatus>
</pagedata>

TIP: It is informative to use the 'Show Java' option on the 'Actions' Button on the Activity Screen in the Designer Studio - I used this to remind myself how to get at the API needed to fetch stuff from the parameters page for instance : just create a standard 'Property-Set' step which references 'Param.yourparam' , save the Activity and then 'View Java'.

Also: The Engine Java API is available from the Designer Studio from the Resources > Engine API menu. (on 721, other versions have a 'help' menu).

Useful Engine Classes to look at to start with:

PublicAPI (this is what 'tools' is an instance of, in automatic code)

ClipboardPage (this is what 'myStepPage' is an instance of , in automatic code).

ClipboardProperty

Hope this helps,

Cheers

John