Lancer un fichier et attendre sa fermeture

{ce truc permet de lancer une application mais aussi d'ouvrir automatiquement
l'application associée à un raccourci}

uses
Shellapi;

function StartAssociatedExe(FileName: string; var ErrorCode: Cardinal): Boolean;
var
Prg: string;
ProcessInfo: TProcessInformation;
StartupInfo: TStartupInfo;
begin
SetLength(Prg, MAX_PATH);
Result := False;
ErrorCode := FindExecutable(PChar(FileName), nil, PChar(Prg));
if ErrorCode >= 32 then
begin
SetLength(Prg, StrLen(PChar(Prg)));
FillChar(StartupInfo, SizeOf(TStartupInfo), 0);
with StartupInfo do
begin
cb := SizeOf(TStartupInfo);
wShowWindow := SW_SHOW;
end;
if CreateProcess(PChar(Prg), PChar(Format('%s %s', [Prg, FileName])),
nil, nil, False, NORMAL_PRIORITY_CLASS, nil, nil, StartupInfo, ProcessInfo) then
begin
WaitForSingleObject(ProcessInfo.hProcess, INFINITE);
GetExitCodeProcess(ProcessInfo.hProcess, ErrorCode);
CloseHandle(ProcessInfo.hProcess);
CloseHandle(ProcessInfo.hThread);
Result := True;
end
else
ErrorCode := GetLastError;
end;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
ErrorCode: Cardinal;
begin
if StartAssociatedExe('c:monfichier.bmp', ErrorCode) then
Showmessage('fin de l''application')
else showmessage(SysErrorMessage(ErrorCode));
end;