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Frequently Asked Questions

Copying files using the Standard Windows Copy file dialog box

Question:

Is there any way to copy a group of files and use the same file copy animation dialog box that the Windows Explorer uses?

Answer:

The following example demonstrates using the SHFileOperation
function to copy a group of files and display a progress dialog. You
can also use the following flags to delete, move and rename a
group of files.

TO_COPY
FO_DELETE
FO_MOVE
FO_RENAME

Note: The buffer that contains the file names to copy must 
end with a double null terminating character;

Example:

uses ShellAPI;

procedure TForm1.Button1Click(Sender: TObject);
var
 Fo      : TSHFileOpStruct;
 buffer  : array[0..4096] of char;
 p       : pchar;

begin
  FillChar(Buffer, sizeof(Buffer), #0);
  p := @buffer;
  p := StrECopy(p, 'C:\DownLoad\1.ZIP') + 1;
  p := StrECopy(p, 'C:\DownLoad\2.ZIP') + 1;
  p := StrECopy(p, 'C:\DownLoad\3.ZIP') + 1;
  StrECopy(p, 'C:\DownLoad\4.ZIP');

  FillChar(Fo, sizeof(Fo), #0);
  Fo.Wnd    := Handle;
  Fo.wFunc  := FO_COPY;
  Fo.pFrom  := @Buffer;
  Fo.pTo    := 'D:\';
  Fo.fFlags := 0;
  if ((SHFileOperation(Fo) <> 0) or
      (Fo.fAnyOperationsAborted <> false)) then
    ShowMessage('Cancelled')
end;

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