Копирование потока компонент в буфер обмена

Оформил: DeeCo

{ 
  Clipboard has  methods  GetComponent and SetComponent but we need 
  to stream multiple components to the clipboard to include copy paste type 
  of feature. 

  Die Zwischenablage hat die Methoden GetComponent and SetComponent 
  aber wir wollen mehrere Komponenten in die 
  Zwischenablage speichern und wieder auslesen. 
}


 procedure CopyStreamToClipboard(fmt: Cardinal; S: TStream);
 var
   hMem: THandle;
   pMem: Pointer;
 begin
   S.Position := 0;
   hMem       := GlobalAlloc(GHND or GMEM_DDESHARE, S.Size);
   if hMem <> 0 then
    begin
     pMem := GlobalLock(hMem);
     if pMem <> nil then
      begin
       S.Read(pMem^, S.Size);
       S.Position := 0;
       GlobalUnlock(hMem);
       Clipboard.Open;
       try
         Clipboard.SetAsHandle(fmt, hMem);
       finally
         Clipboard.Close;
       end;
     end { If }
     else
      begin
       GlobalFree(hMem);
       OutOfMemoryError;
     end;
   end { If }
   else
     OutOfMemoryError;
 end; { CopyStreamToClipboard }


 procedure CopyStreamFromClipboard(fmt: Cardinal; S: TStream);
 var
   hMem: THandle;
   pMem: Pointer;
 begin
   hMem := Clipboard.GetAsHandle(fmt);
   if hMem <> 0 then
    begin
     pMem := GlobalLock(hMem);
     if pMem <> nil then
      begin
       S.Write(pMem^, GlobalSize(hMem));
       S.Position := 0;
       GlobalUnlock(hMem);
     end { If }
     else
       raise Exception.Create('CopyStreamFromClipboard: could not lock global handle ' +
         'obtained from clipboard!');
   end; { If }
 end; { CopyStreamFromClipboard }