Как получить и изменить координаты иконок на столе?

// For Win9x:
//-------------------------------------------
 
uses
  CommCtrl,
  IPCThrd; (from your Delphi\Demos\Ipcdemos directory)
 
function GetDesktopListViewHandle: THandle;
var
  S: String;
begin
  Result := FindWindow('ProgMan', nil);
  Result := GetWindow(Result, GW_CHILD);
  Result := GetWindow(Result, GW_CHILD);
  SetLength(S, 40);
  GetClassName(Result, PChar(S), 39);
  if PChar(S) <> 'SysListView32' then Result := 0;
end;
 
procedure TForm1.Button1Click(Sender: TObject);
 type
   PInfo = ^TInfo;
   TInfo = packed record
     infoPoint: TPoint;
     infoText: array[0..255] of Char;
     infoItem: TLVItem;
     infoFindInfo: TLVFindInfo;
   end;
var
   r : TRect;
   hWnd : THandle;
   i, iCount : Integer;
 
   Info: PInfo;
   SharedMem: TSharedMem;
begin
  hWnd := GetDesktopWindow();
  GetWindowRect(hWnd,r);
  Memo.Lines.Add('Bottom: ' +  IntToStr(r.Bottom));
  Memo.Lines.Add('Right: ' + IntToStr(r.Right));
 
  hWnd := GetDesktopListViewHandle;
  iCount := ListView_GetItemCount(hWnd);
  Memo.Lines.Add('# Icons: ' + IntToStr(iCount));
 
  SharedMem := TSharedMem.Create('', SizeOf(TInfo));
  Info := SharedMem.Buffer;
 
   with Info^ do
   try
     infoItem.pszText := infoText;
     infoItem.cchTextMax := 255;
     infoItem.mask := LVIF_TEXT;
     try
       begin
         for i := 0 to iCount - 1 do
         begin
           infoItem.iItem := i;
           try
             ListView_GetItem(hWnd, infoItem);
             ListView_GetItemPosition(hWnd, I, infoPoint);
             Memo.Lines.Add('Icon: ' + infoText);
             Memo.Lines.Add('   X: ' + IntToStr(infoPoint.X));
             Memo.Lines.Add('   Y: ' + IntToStr(infoPoint.Y));
           except
           end;
         end;
       end;
     finally
     end;
   finally
     SharedMem.Free;
   end;
end;

// For NT, Win2k, XP:
//-------------------------------------------
// Unit to save/restore the positions of desktop icons to/from the registry)
 
unit dipsdef;
 
interface
 
uses
  Windows, CommCtrl;
 
const
  RegSubKeyName = 'Software\LVT\Desktop Item Position Saver';
 
procedure RestoreDesktopItemPositions;
procedure SaveDesktopItemPositions;
 
implementation
 
uses
  uvirtalloc, registry;
 
procedure SaveListItemPosition(LVH : THandle; RemoteAddr : Pointer);
var
  lvi : TLVITEM;
  lenlvi : integer;
  nb : integer;
  buffer : array [0..MAX_PATH] of char;
  Base : Pointer;
  Base2 : PByte;
  i, ItemsCount : integer;
  Apoint : TPoint;
  key : HKEY;
  Dummy : integer;
begin
  ItemsCount := SendMessage(LVH, LVM_GETITEMCOUNT, 0, 0);
  Base := RemoteAddr;
  lenlvi := SizeOf(lvi);
  FillChar(lvi, lenlvi, 0);
  lvi.cchTextMax := 255;
  lvi.pszText := Base;
  inc(lvi.pszText, lenlvi);
 
  WriteToRemoteBuffer(@lvi, Base, 255);
 
  Base2 := Base;
  inc(Base2, Lenlvi);
 
  RegDeleteKey(HKEY_CURRENT_USER, RegSubKeyName);
 
  RegCreateKeyEx(HKEY_CURRENT_USER,
    PChar(RegSUbKeyName),
    0,
    nil,
    REG_OPTION_NON_VOLATILE,
    KEY_SET_VALUE,
    nil,
    key,
    nil);
 
  for i := 0 to ItemsCount - 1 do
  begin
    nb := SendMessage(LVH, LVM_GETITEMTEXT, i, LParam(Base));
 
    ReadRemoteBuffer(Base2, @buffer, nb + 1);
    FillChar(Apoint, SizeOf(Apoint), 0);
 
    WriteToRemoteBuffer(@APoint, Base2, SizeOf(Apoint));
    SendMessage(LVH, LVM_GETITEMPOSITION, i, LParam(Base) + lenlvi);
 
    ReadRemoteBuffer(Base2, @Apoint, SizeOf(Apoint));
    RegSetValueEx(key, @buffer, 0, REG_BINARY, @Apoint, SizeOf(APoint));
  end;
  RegCloseKey(key);
end;
 
 
procedure RestoreListItemPosition(LVH : THandle; RemoteAddr : Pointer);
type
  TInfo = packed record
    lvfi : TLVFindInfo;
    Name : array [0..MAX_PATH] of char;
  end;
var
  SaveStyle : Dword;
  Base : Pointer;
  Apoint : TPoint;
  key : HKey;
  idx : DWord;
  info : TInfo;
  atype : Dword;
  cbname, cbData : Dword;
  itemidx : DWord;
begin
  SaveStyle := GetWindowLong(LVH, GWL_STYLE);
  if (SaveStyle and LVS_AUTOARRANGE) = LVS_AUTOARRANGE then
    SetWindowLong(LVH, GWL_STYLE, SaveStyle xor LVS_AUTOARRANGE);
 
  RegOpenKeyEx(HKEY_CURRENT_USER, RegSubKeyName, 0, KEY_QUERY_VALUE, key);
 
  FillChar(info, SizeOf(info), 0);
  Base := RemoteAddr;
 
  idx := 0;
  cbname := MAX_PATH;
  cbdata := SizeOf(APoint);
 
  while (RegEnumValue(key, idx, info.Name, cbname, nil, @atype, @Apoint, @cbData) <>
    ERROR_NO_MORE_ITEMS) do
  begin
    if (atype = REG_BINARY) and (cbData = SizeOf(Apoint)) then
    begin
      info.lvfi.flags := LVFI_STRING;
      info.lvfi.psz := Base;
      inc(info.lvfi.psz, SizeOf(info.lvfi));
      WriteToRemoteBuffer(@info, Base, SizeOf(info.lvfi) + cbname + 1);
      itemidx := SendMessage(LVH, LVM_FINDITEM, - 1, LParam(Base));
      if itemidx > -1 then
        SendMessage(LVH, LVM_SETITEMPOSITION, itemidx, MakeLong(Apoint.x, Apoint.y));
    end;
    inc(idx);
    cbname := MAX_PATH;
    cbdata := SizeOf(APoint);
  end;
  RegCloseKey(key);
 
  SetWindowLong(LVH, GWL_STYLE, SaveStyle);
end;
 
function GetSysListView32: THandle;
begin
  Result := FindWindow('Progman', nil);
  Result := FindWindowEx(Result, 0, nil, nil);
  Result := FindWindowEx(Result, 0, nil, nil);
end;
 
procedure SaveDesktopItemPositions;
var
  pid : integer;
  rembuffer : PByte;
  hTarget : THandle;
begin
  hTarget := GetSysListView32;
  GetWindowThreadProcessId(hTarget, @pid);
  if (hTarget = 0) or (pid = 0) then
    Exit;
  rembuffer := CreateRemoteBuffer(pid, $FFF);
  if Assigned(rembuffer) then
  begin
    SaveListItemPosition(hTarget, rembuffer);
    DestroyRemoteBuffer;
  end;
end;
 
procedure RestoreDesktopItemPositions;
var
  hTarget : THandle;
  pid : DWord;
  rembuffer : PByte;
begin
  hTarget := GetSysListView32;
  GetWindowThreadProcessId(hTarget, @pid);
  if (hTarget = 0) or (pid = 0) then
    Exit;
  rembuffer := CreateRemoteBuffer(pid, $FFF);
  if Assigned(rembuffer) then
  begin
    RestoreListItemPosition(hTarget, rembuffer);
    DestroyRemoteBuffer;
  end;
end;
 
end.

unit uvirtalloc;
 
interface
 
uses
  Windows, SysUtils;
 
function CreateRemoteBuffer(Pid : DWord; Size: Dword): PByte;
procedure WriteToRemoteBuffer(Source : PByte;
                               Dest : PByte;
                               Count : Dword);
 
function ReadRemoteBuffer (Source : PByte;
                            Dest : PByte;
                            Count : Dword): Dword;
 
procedure DestroyRemoteBuffer;
 
implementation
 
var
  hProcess : THandle;
  RemoteBufferAddr: PByte;
  BuffSize : DWord;
 
function CreateRemoteBuffer;
begin
  RemoteBufferAddr := nil;
  hProcess := OpenProcess(PROCESS_ALL_ACCESS, FALSE, Pid);
  if (hProcess = 0) then
    RaiseLastWin32Error;
 
  Result := VirtualAllocEx(hProcess,
                            nil,
                            Size,
                            MEM_COMMIT,
                            PAGE_EXECUTE_READWRITE);
 
  Win32Check(Result <> nil);
  RemoteBufferAddr := Result;
  BuffSize := Size;
end;
 
procedure WriteToRemoteBuffer;
var
  BytesWritten: Dword;
begin
 if hProcess = 0 then
   Exit;
 Win32Check(WriteProcessMemory(hProcess,
                                Dest,
                                Source,
                                Count,
                                BytesWritten));
end;
 
function ReadRemoteBuffer;
begin
  Result := 0;
  if hProcess = 0 then
     Exit;
 
  Win32Check(ReadProcessMemory(hProcess,
                                Source,
                                Dest ,
                                Count,
                                Result));
end;
 
procedure DestroyRemoteBuffer;
begin
   if (hProcess > 0)  then
     begin
       if Assigned(RemoteBufferAddr) then
         Win32Check(Boolean(VirtualFreeEx(hProcess,
                                          RemoteBufferAddr,
                                          0,
                                          MEM_RELEASE)));
       CloseHandle(hProcess);
     end;
end;
 
end.

Other Source for NT, Win2k, XP only:

https://www.luckie-online.de/programme/luckiedipssfx.exe

(Complete demo to save/restore the positions of desktop icons, nonVCL)

Взято с сайта https://www.swissdelphicenter.ch/en/tipsindex.php