I need to write a trigger on Task so that it fires only for the records that are created in the UI.

For the records that get created through Outlook etc. I want to bypass the trigger. 

Hw to achieve that logic. Is there any way to identify the records created from API or from UI?

Pls let me know ASAP.. Thnx

I need to update a Checkbox on click of the New Task button. But the Field is a read only field at the Pagelayout.

Is there any way I can select that checkbx using Scontrol .

I tried the below code but it is not working on Readonly fields(except for Sys Admin Login)

function LoadingA()
{
var url = parent.location.href;
url += "&00NT0000000mtfv="+"1";
url += "&nooverride=1";
alert("url : "+url);
parent.location.href = url;
} 

I need to write a trigger on Task so that it fires only for the records that are created in the UI.

For the records that get created through Outlook etc. I want to bypass the trigger. 

Hw to achieve that logic. Is there any way to identify the records created from API or from UI?

Pls let me know ASAP.. Thnx