Did you try?

this.WpChan = DDEInitiate('WPWIN90_macros',"commands")

AFAIK, wp 9.0 is automation server. You can go that way too.

>i have an old program that has the following in it's code. It used to use wp 6.0 to run macros to run reports. How can i change to work on wp 9.0?

>DO while this.WpChan=-1 .and. i<11
>	this.WpChan = DDEInitiate('WPWIN60_macros',"commands")
>	i=i+1
>ENDDO