{
This code displays the application/file "Open With" dialog
Passing the full file path and name as a parameter will cause the
dialog to display the line "Click the program you want to use to open
the file 'filename'".
}
uses
ShellApi;
procedure OpenWith(FileName: string);
begin
ShellExecute(Application.Handle, 'open', PChar('rundll32.exe'),
PChar('shell32.dll,OpenAs_RunDLL ' + FileName), nil, SW_SHOWNORMAL);
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
if Opendialog1.Execute then
OpenWith(Opendialog1.FileName);
end;