设置ListView的页眉图标

(*//
标题:设置ListView的页眉图标
说明:可以用来做排序修饰图标
设计:Zswang
支持:wjhu111@21cn.com
日期:2004-03-25
//*)

uses CommCtrl;

function ListViewHeaderImages(mListView: TListView; mImages: TImageList): Boolean;
var
  vHandle: THandle;
begin
  Result := False;
  if not Assigned(mListView) then Exit;
  vHandle := ListView_GetHeader(mListView.Handle);
  if Assigned(mImages) then
    Header_SetImageList(vHandle, mImages.Handle)
  else Header_SetImageList(vHandle, 0);
  Result := True;
end; { ListViewHeaderImages }

function ListColumnImageIndex(mColumn: TListColumn;
  mImageIndex: Integer; mRight: Boolean = True): Boolean;
var
  vHandle: THandle;
  vHDItem: THDItem;
begin
  Result := False;
  if not Assigned(mColumn) then Exit;
  vHandle := ListView_GetHeader(TListView(mColumn.Collection.Owner).Handle);
  FillChar(vHDItem, SizeOf(vHDItem), 0);
  Header_GetItem(vHandle, mColumn.Index, vHDItem);
  if mImageIndex < 0 then begin
    vHDItem.Mask := HDI_FORMAT;
    vHDItem.fmt := HDF_STRING;
  end else begin
    vHDItem.Mask := HDI_IMAGE or HDI_FORMAT;
    vHDItem.iImage := mImageIndex;
    vHDItem.fmt := HDF_STRING or HDF_IMAGE or
      (HDF_BITMAP_ON_RIGHT * Ord(mRight));
  end;
  Header_SetItem(vHandle, mColumn.Index, vHDItem);
end; { ListColumnImageIndex }

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