You could create a web service integration component that points to your URL. That should get you in the right direction. I believe you could also recompile the Symantec.Components.Generated7.Altiris.ASDKTask library and it might create a component for your specific task(s), though it's been a great long while since I've done this, and can't vouch for the success of an attempt to do so.
Here's how you'd go about creating a web service component:
- create a new integration library
- add a new generator
- scroll down and select Web Service Caller Generator
- name the generator and hit next
- supply the URL and any required authentication
- next through the rest of it, making adjustments as needed
- compile the integration library
- import the library into your workflow/webforms project
- find the components that were created dynamically during the compilation of the library
- get the proper Execute Task component and supply the appropriate variables
- debug and enjoy
Let me know if you need any further details.
Your specific question about executing a task notwithstanding, I should add to this that in the past I've simply used filters and targets to handle task execution, and used Workflow to add a computer to the appropriate filter. Afterwards, we just let updateconfigs and checkins run their course.