CComboBox::GetExtendedUI
Call the GetExtendedUI member function to determine whether a combo box has the default user interface or the extended user interface.
BOOL GetExtendedUI( ) const;
Return Value
Nonzero if the combo box has the extended user interface; otherwise 0.
Remarks
The extended user interface can be identified in the following ways:
Clicking the static control displays the list box only for combo boxes with the CBS_DROPDOWNLIST style.
Pressing the DOWN ARROW key displays the list box (F4 is disabled).
Scrolling in the static control is disabled when the item list is not visible (arrow keys are disabled).
Example
// Use the extended UI if it is not already set.
if (!m_pComboBox->GetExtendedUI())
m_pComboBox->SetExtendedUI(TRUE);
Requirements
Header: afxwin.h