int = GetEditSel()
Returns the selection of the edit control portion of a combo box.
MFC References
CComboBox::GetEditSel
Return Value
A 32-bit value that contains the starting position in the low-order word and
the position of the first nonselected character after the end of
the selection in the high-order word. If this function is used on a combo box
without an edit control, an exception is raised.