D365F&O - X++ - Get datasources in datasource extension on form

[ExtensionOf(formdatasourcestr(VendPaymMode,CustomTable))]

final class MJ_VendPaymMode_MJVendPaymModeTable_Extension

{

    public void write()

    {

        //Get the datasource for which we are writing extension on form

        CustomTable customTable = this.cursor();

        //Get another datasource on form

        VendPaymModeTable VendPaymModeTable = this.formRun().dataSource(

                formdatasourcestr(VendPaymMode, VendPaymModeTable)).cursor();

        customTable.VendPaymModeRecId = VendPaymModeTable.RecId;

        next write();

    }

}