I used a CCTIButton class to created a button in the Softphone GUI to navigate to linked Task URL. But I don't know how to get the current call who_id (Contact/Lead) or what_id (Account/Opportunity/Campaigne) that I need in SetLinkURL function parameter. What I am trying to accomplish is to mimic the 'Call A Log' functionality in the Activity History section of Contact or Account Page.

Is there any API I can use to get those information?

I used a CCTIButton class to created a button in the Softphone GUI to navigate to linked Task URL. But I don't know how to get the current call who_id (Contact/Lead) or what_id (Account/Opportunity/Campaigne) that I need in SetLinkURL function parameter. What I am trying to accomplish is to mimic the 'Call A Log' functionality in the Activity History section of Contact or Account Page.

Is there any API I can use to get those information?