Note that the JavaDoc for CCombo is very clear on what its purpose is: “CCombo was written to work around certain limitations in the native combo box. Specifically, on win32, the height of a CCombo can be set attempts to set the height of a Combo are ignored. CCombo can be used anywhere that having the increased flexibility is more important than getting native L&F, but the decision should not be taken lightly. There is no strict requirement that CCombo look or behave the same as the native combo box.”