Need help on Multiple SO's to single invoice with X++, AX2009

Hi All,

Here is my requirement,

I have multiple Sales Orders example:  SO-1, SO-2, SO-3 with same Customer Account number “111111” and  with status “Picking in progress”.

Need to do Single Invoice for the above SO’s automatically with X++ code.As standard AX support this functionality but have challenge to do with X++.

If somebody has faced/done the same requirement please help me to achieve this. Thanks in advance.

Regards,

Sunil.