How to update absence table of employee master data in SDK?

Hi all,

I have a problem in SAP B1 SDK,

Actually I can add employee in employee master data by using SDK like below codes

$oOrder=$mycomp->GetBusinessObject(171);
$oOrder->firstName="Schadrack";
$oOrder->lastName="Rurangwa";
$RetCode=$oOrder->Add;

But now I want to add absence line to the existing employee in SAP B1, how can I add absence or update the table (HEM1) of absence in SAP B1 SDK, I used PHP but I need sample even if it is vb

Please anyone can help me