Не удается запустить стороннее приложение Delphi

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Buttons, StdCtrls;
 
type
  TForm1 = class(TForm)
    edApp: TEdit;
    Label1: TLabel;
    edFile: TEdit;
    Label2: TLabel;
    SpeedButton1: TSpeedButton;
    SpeedButton2: TSpeedButton;
    OpenDialog1: TOpenDialog;
    btnStart: TSpeedButton;
    btnClose: TSpeedButton;
    Label3: TLabel;
    lblInfo: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure SpeedButton1Click(Sender: TObject);
    procedure SpeedButton2Click(Sender: TObject);
    procedure btnStartClick(Sender: TObject);
    procedure btnCloseClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
    pInfo: TprocessInformation; //Ñòðóêòóðà, ñîäåðæàùàÿÿ èíôîðìàöèþ î ñîçäàííîì ïðîöåññå
implementation
 
{$R *.dfm}
 
procedure TForm1.FormCreate(Sender: TObject);
begin
 edApp.Text:='C:\Program Files (x86)\Microsoft Office\Office12\powerpnt.exe';
end;
 
procedure TForm1.SpeedButton1Click(Sender: TObject);
begin
   openDialog1.Filter:='Ïðîãðàììà(*.exe)|*.exe';
    if not openDialog1.Execute then
     ShowMessage('Îøèáêà îòêðûòèÿ ôàéëà') else
      edApp.Text:=openDialog1.Files.Strings[0];
end;
 
procedure TForm1.SpeedButton2Click(Sender: TObject);
begin
   openDialog1.Filter:='Ïðåçåíòàöèÿ PowerPoint(*.ppt)|*.ppt|Äîêóìåíò Word(*.doc)|*.doc|Äîêóìåíò Excel(*.xls)|*.xls';
    if not openDialog1.Execute then
     ShowMessage('Îøèáêà îòêðûòèÿ ôàéëà!') else
       edFile.Text:=openDialog1.Files.Strings[0];
end;
 
procedure TForm1.btnStartClick(Sender: TObject);
   var
    SInfo:TStartupInfo;
begin
   FillChar(SInfo,SizeOf(SInfo),#0);
    SInfo.cb:=sizeOf(SInfo);
     if edFile.Text='' then
      ShowMessage('Çàïîëíèòå âñå ïîëÿ.')else
begin
   if not
     CreateProcess(nil,PChar(Trim(edApp.Text)+''+''+Trim(edFile.Text)+''+''),
    nil,nil,false,REALTIME_PRIORITY_CLASS,nil,nil,SInfo,pInfo) then
     ShowMessage(IntToStr(GetLastError));
      lblInfo.Caption:='Äèñêðèïòîð ïîòîêà:'+#13+IntToStr(pInfo.hThread)+#13+#13+'Ãëîáàëüíûé èíäåôèêàòîð'+#13+IntToStr(pInfo.dwProcessId);
 
end;
   end;
procedure TForm1.btnCloseClick(Sender: TObject);
  var exCode:LongWord;
begin
   if not GetExitCodeProcess(pInfo.hProcess,exCode) then
    ShowMessage('Îøèáêà çàâåðøåíèÿ ïðîöåññà'+intToStr(GetLastError));
     TerminateProcess(pInfo.hProcess,exCode);
      lblInfo.Caption:='';
end;
 
end.

var
  SInfo : TStartupInfo;
  PInfo : TprocessInformation;
procedure TForm1.btnStartClick(Sender: TObject);
begin
   ZeroMemory(@SInfo, SizeOf(SInfo));
   SInfo.cb := SizeOf(SInfo);
   ZeroMemory(@pInfo, SizeOf(pInfo));
 
   if not CreateProcess(PChar(Trim(edApp.Text)),
             PChar(Format('"%s" "%s"', [Trim(edApp.Text), Trim(edFile.Text)])),
             nil, nil, False, REALTIME_PRIORITY_CLASS, nil, nil, SInfo, PInfo)
   then ShowMessage(SysErrorMessage(GetLastError));
end;

procedure TForm1.btnCloseClick(Sender: TObject);
  var exCode:LongWord;
begin
   if not GetExitCodeProcess(pInfo.hProcess,exCode) then
    ShowMessage('Îøèáêà çàâåðøåíèÿ ïðîöåññà'+intToStr(GetLastError));
     SendMessage(exCode, WM_CLOSE, 0, 0);
     TerminateProcess(pInfo.hProcess,exCode);
      lblInfo.Caption:='';
end;