Include ComboBox in flex datagrid header

I want the comboBox to be placed in one of the columns of the datagrid header.The datagrid should be filtered according to the value selected i开发者_运维知识库n the comboBox. Can anyone help me out in this with a sample code.

Thanks in advance.

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Provide headerRenderer for DatagridColumn. Just create canvas with label and combobox.