有空研究一下OwnerDraw和三种Windows风格CS_OWNDC和CS_PARENTDC和CS_CLASSDC

就在StdCtrls.pas, ExtCtrls.pas和Buttons.pas三个类里研究就够了，这是初步的搜索结果：

---------- 在打开的文档中查找 ----------
"G:StdCtrls.pas"(410,4):  TOwnerDrawState = Windows.TOwnerDrawState;
"G:StdCtrls.pas"(411,15):  {$NODEFINE TOwnerDrawState}
"G:StdCtrls.pas"(415,26):    Rect: TRect; State: TOwnerDrawState) of object;
"G:StdCtrls.pas"(528,61):  TComboBoxStyle = (csDropDown, csSimple, csDropDownList, csOwnerDrawFixed,
"G:StdCtrls.pas"(529,7):    csOwnerDrawVariable);
"G:StdCtrls.pas"(560,15):      State: TOwnerDrawState); virtual;
"G:StdCtrls.pas"(882,34):  TListBoxStyle = (lbStandard, lbOwnerDrawFixed, lbOwnerDrawVariable,
"G:StdCtrls.pas"(883,25):    lbVirtual, lbVirtualOwnerDraw);
"G:StdCtrls.pas"(953,15):      State: TOwnerDrawState); virtual;
"G:StdCtrls.pas"(2794,11):  State: TOwnerDrawState);
"G:StdCtrls.pas"(2971,19):  if FStyle in [csOwnerDrawFixed, csOwnerDrawVariable] then
"G:StdCtrls.pas"(2980,29):    CBS_DROPDOWNLIST or CBS_OWNERDRAWFIXED,
"G:StdCtrls.pas"(2981,29):    CBS_DROPDOWNLIST or CBS_OWNERDRAWVARIABLE);
"G:StdCtrls.pas"(3189,11):  State: TOwnerDrawState;
"G:StdCtrls.pas"(3193,15):    State := TOwnerDrawState(LongRec(itemState).Lo);
"G:StdCtrls.pas"(3219,19):    if FStyle = csOwnerDrawVariable then
"G:StdCtrls.pas"(3830,44):  if ListBox.Style in [lbVirtual, lbVirtualOwnerDraw] then
"G:StdCtrls.pas"(3847,44):  if ListBox.Style in [lbVirtual, lbVirtualOwnerDraw] then
"G:StdCtrls.pas"(3873,67):  if (Index <> -1) and not (ListBox.Style in [lbVirtual, lbVirtualOwnerDraw]) then
"G:StdCtrls.pas"(3880,44):  if ListBox.Style in [lbVirtual, lbVirtualOwnerDraw] then exit;
"G:StdCtrls.pas"(3887,44):  if ListBox.Style in [lbVirtual, lbVirtualOwnerDraw] then exit;
"G:StdCtrls.pas"(3903,44):  if ListBox.Style in [lbVirtual, lbVirtualOwnerDraw] then exit;
"G:StdCtrls.pas"(3934,44):  if ListBox.Style in [lbVirtual, lbVirtualOwnerDraw] then
"G:StdCtrls.pas"(3945,44):  if ListBox.Style in [lbVirtual, lbVirtualOwnerDraw] then exit;
"G:StdCtrls.pas"(4032,36):  if Style in [lbVirtual, lbVirtualOwnerDraw] then exit;
"G:StdCtrls.pas"(4118,36):  if Style in [lbVirtual, lbVirtualOwnerDraw] then
"G:StdCtrls.pas"(4224,36):  if Style in [lbVirtual, lbVirtualOwnerDraw] then exit;
"G:StdCtrls.pas"(4236,38):    if Value in [lbVirtual, lbVirtualOwnerDraw] then
"G:StdCtrls.pas"(4255,36):  if Style in [lbVirtual, lbVirtualOwnerDraw] then
"G:StdCtrls.pas"(4275,36):  if Style in [lbVirtual, lbVirtualOwnerDraw] then
"G:StdCtrls.pas"(4307,36):  if Style in [lbVirtual, lbVirtualOwnerDraw] then
"G:StdCtrls.pas"(4310,16):      lbVirtualOwnerDraw: Style := lbOwnerDrawFixed;
"G:StdCtrls.pas"(4355,13):    (0, LBS_OWNERDRAWFIXED, LBS_OWNERDRAWVARIABLE, LBS_OWNERDRAWFIXED,
"G:StdCtrls.pas"(4356,10):     LBS_OWNERDRAWFIXED);
"G:StdCtrls.pas"(4375,47):      Data[Self.Style in [lbVirtual, lbVirtualOwnerDraw]] or
"G:StdCtrls.pas"(4402,39):    if (Style in [lbVirtual, lbVirtualOwnerDraw]) then
"G:StdCtrls.pas"(4419,39):    if (Style in [lbVirtual, lbVirtualOwnerDraw]) then
"G:StdCtrls.pas"(4573,11):  State: TOwnerDrawState);
"G:StdCtrls.pas"(4589,41):      if (Style in [lbVirtual, lbVirtualOwnerDraw]) then
"G:StdCtrls.pas"(4605,11):  State: TOwnerDrawState;
"G:StdCtrls.pas"(4609,15):    State := TOwnerDrawState(LongRec(itemState).Lo);
"G:StdCtrls.pas"(4631,19):    if FStyle = lbOwnerDrawVariable then
"G:StdCtrls.pas"(4657,38):    if Style in [lbVirtual, lbVirtualOwnerDraw] then
"G:StdCtrls.pas"(4717,36):  if Style in [lbVirtual, lbVirtualOwnerDraw] then
"G:ExtCtrls.pas"(965,61):    procedure DrawItem(Index: Integer; Rect: TRect; State: TOwnerDrawState); override;
"G:ExtCtrls.pas"(4951,24):  inherited Style := csOwnerDrawFixed;
"G:ExtCtrls.pas"(4967,11):  State: TOwnerDrawState);
"G:Buttons.pas"(1473,39):  with Params do Style := Style or BS_OWNERDRAW;
共找到 48 处。
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