unit unit1;
interface
uses
 Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
 StdCtrls, ExtCtrls;
type
 TForm1 = class(TForm)
  Button1: TButton;
  Timer1: TTimer;
  Image1: TImage;
  procedure Button1Click(Sender: TObject);
  procedure Timer1Timer(Sender: TObject);
 private
  function StringToIcon(const st: string): HIcon;
 public
{ Public declarations }
 end;
var
 Form1: TForm1;
 sss: Integer = 0;
implementation
{$R *.DFM}
type
 ICONIMAGE = record
  Width, Height, Colors: DWORD; // Ширина, Высота и кол-во цветов
  lpBits: PChar; // указатель на DIB биты
  dwNumBytes: DWORD; // Сколько байт?
  lpbi: PBitmapInfoHeader; // указатель на заголовок
  lpXOR: PChar; // указатель на XOR биты изображения
  lpAND: PChar; // указатель на AND биты изображения
 end;
function CopyColorTable(var lpTarget: BITMAPINFO; const lpSource:
 BITMAPINFO): boolean;
var
 dc: HDC;
 hPal: HPALETTE;
 pe: array[0..255] of PALETTEENTRY;
 i: Integer;
begin
 result := False;
 case (lpTarget.bmiHeader.biBitCount) of
  8:
  if lpSource.bmiHeader.biBitCount = 8 then
  begin
  Move(lpSource.bmiColors, lpTarget.bmiColors, 256 * sizeof(RGBQUAD));
  result := True
  end
  else
  begin
  dc := GetDC(0);
  if dc <> 0 then
  try
  hPal := CreateHalftonePalette(dc);
  if hPal <> 0 then
  try
  if GetPaletteEntries(hPal, 0, 256, pe) <> 0 then
  begin
  for i := 0 to 255 do
  begin
  lpTarget.bmiColors[i].rgbRed := pe[i].peRed;
  lpTarget.bmiColors[i].rgbGreen := pe[i].peGreen;
  lpTarget.bmiColors[i].rgbBlue := pe[i].peBlue;
  lpTarget.bmiColors[i].rgbReserved := pe[i].peFlags
  end;
  result := True
  end
  finally
  DeleteObject(hPal)
  end
  finally
  ReleaseDC(0, dc)
  end
  end;
  4:
  if lpSource.bmiHeader.biBitCount = 4 then
  begin
  Move(lpSource.bmiColors, lpTarget.bmiColors, 16 * sizeof(RGBQUAD));
  result := True
  end
  else
  begin
  hPal := GetStockObject(DEFAULT_PALETTE);
  if (hPal <> 0) and (GetPaletteEntries(hPal, 0, 16, pe) <> 0) then
  begin
  for i := 0 to 15 do
  begin
  lpTarget.bmiColors[i].rgbRed := pe[i].peRed;
  lpTarget.bmiColors[i].rgbGreen := pe[i].peGreen;
  lpTarget.bmiColors[i].rgbBlue := pe[i].peBlue;
  lpTarget.bmiColors[i].rgbReserved := pe[i].peFlags
  end;
  result := True
  end
  end;
  1:
  begin
  i := 0;
  lpTarget.bmiColors[i].rgbRed := 0;
  lpTarget.bmiColors[i].rgbGreen := 0;
  lpTarget.bmiColors[i].rgbBlue := 0;
  lpTarget.bmiColors[i].rgbReserved := 0;
  i := 1;
  lpTarget.bmiColors[i].rgbRed := 255;
  lpTarget.bmiColors[i].rgbGreen := 255;
  lpTarget.bmiColors[i].rgbBlue := 255;
  lpTarget.bmiColors[i].rgbReserved := 0;
  result := True
  end;
 else
  result := True
 end
end;
function WidthBytes(bits: DWORD): DWORD;
begin
 result := ((bits + 31) shr 5) shl 2
end;
function BytesPerLine(const bmih: BITMAPINFOHEADER): DWORD;
begin
 result := WidthBytes(bmih.biWidth * bmih.biPlanes * bmih.biBitCount)
end;
function DIBNumColors(const lpbi: BitmapInfoHeader): word;
var
 dwClrUsed: DWORD;
begin
 dwClrUsed := lpbi.biClrUsed;
 if dwClrUsed <> 0 then
  result := Word(dwClrUsed)
 else
  case lpbi.biBitCount of
  1: result := 2;
  4: result := 16;
  8: result := 256
  else
  result := 0
  end
end;
function PaletteSize(const lpbi: BitmapInfoHeader): word;
begin
 result := DIBNumColors(lpbi) * sizeof(RGBQUAD)
end;
function FindDIBBits(const lpbi: BitmapInfo): PChar;
begin
 result := @lpbi;
 result := result + lpbi.bmiHeader.biSize + PaletteSize(lpbi.bmiHeader)
end;
function ConvertDIBFormat(var lpSrcDIB: BITMAPINFO; nWidth, nHeight, nbpp: DWORD; bStretch: boolean):
 PBitmapInfo;
var
 lpbmi: PBITMAPINFO;
 lpSourceBits, lpTargetBits: Pointer;
 DC, hSourceDC, hTargetDC: HDC;
 hSourceBitmap, hTargetBitmap, hOldTargetBitmap, hOldSourceBitmap:
 HBITMAP;
 dwSourceBitsSize, dwTargetBitsSize, dwTargetHeaderSize: DWORD;
begin
 result := nil;
// Располагаем и заполняем структуру BITMAPINFO для нового DIB
// Обеспе?иваем достато?но места для 256-цветной таблицы
 dwTargetHeaderSize := sizeof(BITMAPINFO) + (256 * sizeof(RGBQUAD));
 GetMem(lpbmi, dwTargetHeaderSize);
 try
  lpbmi^.bmiHeader.biSize := sizeof(BITMAPINFOHEADER);
  lpbmi^.bmiHeader.biWidth := nWidth;
  lpbmi^.bmiHeader.biHeight := nHeight;
  lpbmi^.bmiHeader.biPlanes := 1;
  lpbmi^.bmiHeader.biBitCount := nbpp;
  lpbmi^.bmiHeader.biCompression := BI_RGB;
  lpbmi^.bmiHeader.biSizeImage := 0;
  lpbmi^.bmiHeader.biXPelsPerMeter := 0;
  lpbmi^.bmiHeader.biYPelsPerMeter := 0;
  lpbmi^.bmiHeader.biClrUsed := 0;
  lpbmi^.bmiHeader.biClrImportant := 0; // Заполняем в таблице цветов
  if CopyColorTable(lpbmi^, lpSrcDIB) then
  begin
  DC := GetDC(0);
  hTargetBitmap := CreateDIBSection(DC, lpbmi^, DIB_RGB_COLORS,
  lpTargetBits, 0, 0);
  hSourceBitmap := CreateDIBSection(DC, lpSrcDIB, DIB_RGB_COLORS,
  lpSourceBits, 0, 0);
  try
  if (dc <> 0) and (hTargetBitmap <> 0) and (hSourceBitmap <> 0) then
  begin
  hSourceDC := CreateCompatibleDC(DC);
  hTargetDC := CreateCompatibleDC(DC);
  try
  if (hSourceDC <> 0) and (hTargetDC <> 0) then
  begin
// Flip the bits on the source DIBSection to match the source DIB
  dwSourceBitsSize := DWORD(lpSrcDIB.bmiHeader.biHeight) * BytesPerLine(lpSrcDIB.bmiHeader);
  dwTargetBitsSize := DWORD(lpbmi^.bmiHeader.biHeight) *
  BytesPerLine(lpbmi^.bmiHeader);
  Move(FindDIBBits(lpSrcDIB)^, lpSourceBits^, dwSourceBitsSize);
// Select DIBSections into DCs
  hOldSourceBitmap := SelectObject(hSourceDC, hSourceBitmap);
  hOldTargetBitmap := SelectObject(hTargetDC, hTargetBitmap);
  try
  if (hOldSourceBitmap <> 0) and (hOldTargetBitmap <> 0) then
  begin
// Устанавливаем таблицу цветов для DIBSections
  if lpSrcDIB.bmiHeader.biBitCount <= 8 then
  SetDIBColorTable(hSourceDC, 0, 1 shl lpSrcDIB.bmiHeader.biBitCount, lpSrcDIB.bmiColors);
  if lpbmi^.bmiHeader.biBitCount <= 8 then
  SetDIBColorTable(hTargetDC, 0, 1 shl
  lpbmi^.bmiHeader.biBitCount, lpbmi^.bmiColors);
// If we are asking for a straight copy, do it
  if (lpSrcDIB.bmiHeader.biWidth = lpbmi^.bmiHeader.biWidth) and (lpSrcDIB.bmiHeader.biHeight = lpbmi^.bmiHeader.biHeight) then
  BitBlt(hTargetDC, 0, 0, lpbmi^.bmiHeader.biWidth, lpbmi^.bmiHeader.biHeight, hSourceDC, 0, 0, SRCCOPY)
  else if bStretch then
  begin
  SetStretchBltMode(hTargetDC, COLORONCOLOR);
  StretchBlt(hTargetDC, 0, 0, lpbmi^.bmiHeader.biWidth,
  lpbmi^.bmiHeader.biHeight,
  hSourceDC, 0, 0, lpSrcDIB.bmiHeader.biWidth, lpSrcDIB.bmiHeader.biHeight,
  SRCCOPY)
  end
  else
  BitBlt(hTargetDC, 0, 0, lpbmi^.bmiHeader.biWidth, lpbmi^.bmiHeader.biHeight, hSourceDC, 0, 0, SRCCOPY);
  GDIFlush;
  GetMem(result, Integer(dwTargetHeaderSize + dwTargetBitsSize));
  Move(lpbmi^, result^, dwTargetHeaderSize);
  Move(lpTargetBits^, FindDIBBits(result^)^, dwTargetBitsSize)
  end
  finally
  if hOldSourceBitmap <> 0 then SelectObject(hSourceDC, hOldSourceBitmap);
  if hOldTargetBitmap <> 0 then SelectObject(hTargetDC, hOldTargetBitmap);
  end
  end
  finally
  if hSourceDC <> 0 then DeleteDC(hSourceDC);
  if hTargetDC <> 0 then
  DeleteDC(hTargetDC)
  end
  end;
  finally
  if hTargetBitmap <> 0 then DeleteObject(hTargetBitmap);
  if hSourceBitmap <> 0 then DeleteObject(hSourceBitmap);
  if dc <> 0 then
  ReleaseDC(0, dc)
  end
  end
 finally
  FreeMem(lpbmi)
 end
end;
function DIBToIconImage(var lpii: ICONIMAGE; var lpDIB: BitmapInfo;
 bStretch: boolean): boolean;
var
 lpNewDIB: PBitmapInfo;
begin
 result := False;
 lpNewDIB := ConvertDIBFormat(lpDIB, lpii.Width, lpii.Height, lpii.Colors,
  bStretch);
 if Assigned(lpNewDIB) then
 try
  lpii.dwNumBytes := sizeof(BITMAPINFOHEADER) // Заголовок
  + PaletteSize(lpNewDIB^.bmiHeader) // Палитра
  + lpii.Height * BytesPerLine(lpNewDIB^.bmiHeader) // XOR маска
  + lpii.Height * WIDTHBYTES(lpii.Width); // AND маска
// Если здесь уже картинка, то освобождаем е?
  if lpii.lpBits <> nil then
  FreeMem(lpii.lpBits);
  GetMem(lpii.lpBits, lpii.dwNumBytes);
  Move(lpNewDib^, lpii.lpBits^, sizeof(BITMAPINFOHEADER) + PaletteSize
  (lpNewDIB^.bmiHeader));
// Выравниваем внутренние указатели/переменные для новой картинки
  lpii.lpbi := PBITMAPINFOHEADER(lpii.lpBits);
  lpii.lpbi^.biHeight := lpii.lpbi^.biHeight * 2;
  lpii.lpXOR := FindDIBBits(PBitmapInfo(lpii.lpbi)^);
  Move(FindDIBBits(lpNewDIB^)^, lpii.lpXOR^, lpii.Height * BytesPerLine
  (lpNewDIB^.bmiHeader));
  lpii.lpAND := lpii.lpXOR + lpii.Height * BytesPerLine
  (lpNewDIB^.bmiHeader);
  Fillchar(lpii.lpAnd^, lpii.Height * WIDTHBYTES(lpii.Width), $00);
  result := True
 finally
  FreeMem(lpNewDIB)
 end
end;
function TForm1.StringToIcon(const st: string): HIcon;
var
 memDC: HDC;
 bmp: HBITMAP;
 oldObj: HGDIOBJ;
 rect: TRect;
 size: TSize;
 infoHeaderSize: DWORD;
 imageSize: DWORD;
 infoHeader: PBitmapInfo;
 icon: IconImage;
 oldFont: HFONT;
begin
 result := 0;
 memDC := CreateCompatibleDC(0);
 if memDC <> 0 then
 try
  bmp := CreateCompatibleBitmap(Canvas.Handle, 16, 16);
  if bmp <> 0 then
  try
  oldObj := SelectObject(memDC, bmp);
  if oldObj <> 0 then
  try
  rect.Left := 0;
  rect.top := 0;
  rect.Right := 16;
  rect.Bottom := 16;
  SetTextColor(memDC, RGB(255, 0, 0));
  SetBkColor(memDC, RGB(128, 128, 128));
  oldFont := SelectObject(memDC, font.Handle);
  GetTextExtentPoint32(memDC, PChar(st), Length(st), size);
  ExtTextOut(memDC, (rect.Right - size.cx) div 2, (rect.Bottom - size.cy) div 2, ETO_OPAQUE, @rect, PChar(st), Length(st), nil);
  SelectObject(memDC, oldFont);
  GDIFlush;
  GetDibSizes(bmp, infoHeaderSize, imageSize);
  GetMem(infoHeader, infoHeaderSize + ImageSize);
  try
  GetDib(bmp, SystemPalette16, infoHeader^, PChar(DWORD(infoHeader) + infoHeaderSize)^);
  icon.Colors := 4;
  icon.Width := 32;
  icon.Height := 32;
  icon.lpBits := nil;
  if DibToIconImage(icon, infoHeader^, True) then
  try
  result := CreateIconFromResource(PByte(icon.lpBits), icon.dwNumBytes, True, $00030000);
  finally
  FreeMem(icon.lpBits)
  end
  finally
  FreeMem(infoHeader)
  end
  finally
  SelectObject(memDC, oldOBJ)
  end
  finally
  DeleteObject(bmp)
  end
 finally
  DeleteDC(memDC)
 end
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
 Application.Icon.Handle := StringToIcon('0');
 Timer1.Enabled := True;
 Button1.Enabled := False;
end;
procedure TForm1.Timer1Timer(Sender: TObject);
begin
 Inc(sss);
 if sss > 100 then sss := 1;
 Application.Icon.Handle := StringToIcon(IntToStr(sss));
end;
end.