IS there a standard BAPI in the BOR used for T-CODE 'FB50' ?

IS there a standard BAPI in the BOR used for T-CODE 'FB50' ? I want to program a interface which use 'FB50' just like 'PurchaseOrder' bapi 'CreateFromData1' uses the T-CODE 'ME21N'?

IF there is not ,what can i do ,

Can i write 'BDC' in my own BAPI ?