自繪ComboBox(帶圖標)

先看看效果

頭文件：

 once<atlimage.h>



 CAddressComboBox :  ~ OnSize(UINT nType,  cx,   DrawItem(LPDRAWITEMSTRUCT   MeasureItem(LPMEASUREITEMSTRUCT *

源文件：

==~&



 CAddressComboBox::OnSize(UINT nType,  cx, = &= == = = lpDrawItemStruct-> nItem = lpDrawItemStruct->= lpDrawItemStruct->= (HICON)lpDrawItemStruct->, rcItem.top, hIcon, , , ,  (nItem !===  (lpDrawItemStruct->itemState & ODS_SELECTED)  
== ~::GetSysColor(COLOR_WINDOWTEXT) & ==, , ETO_OPAQUE, rcText, NULL, |DT_VCENTER|DT_SINGLELINE|->itemHeight =  (CComboBox::OnCreate(lpCreateStruct) == - --,  (!m_imgComboBox.IsNull())   (!m_imgComboBoxThump.IsNull())   ); 
    
     (m_imgComboBox.IsNull())  (m_imgComboBoxThump.IsNull()) &
    CRect rcComboLeft == ,,,
    CRect rcComboTop == = = ,,,
    CRect rcComboBottom == = = ,,,
= &==-= = rcComboThump.left + = = ,,,,,,,,,=, , , , , m_hIcon, , , , = == TME_HOVER |= ;
    TrackMouseEvent(& (!= &&==  += = ==== wParam == ==  nItem = nItem = (nItem == -) =