how to use task scheduler from VB Program

HI alll,
I am trying to schedule a task to run at a particular time from my vb program .From my vb application i am invoking the task scheduler of Windows 98/NT,i want that all programs which i set to run at a particular time ,will be automatically scheduled into task scheduler with just one button click.the task scheduler will run in the background .
i tried it with the AT command but the problem with AT command is that u can't set a task on a particular date such as 13/9/02,u can only give weekdays(M to Su) or days of the month(1 to 31).Now i am thinking to do this with Api,but i couldn't find any API.Is there any API to do this,if there is any other method then please help me.

very very thanks in advance

Arvind