1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:

unit pathfinder;

interface

uses
  Windows;

function GetEXEFromHandle(const wnd: HWND) : string;


implementation

uses
  tlhelp32, psapi;


function GetEXEFromHandle(const wnd: HWND) : string;
var
  pid             : dword;
  wv              : TOSVersionInfo;
  hProcess,
  hp              : THandle;
  ContinueLoop    : boolean;
  aProcessEntry32 : TProcessEntry32;
  buf             : array[0..MAX_PATH]of char;
begin
  // re-set
  Result := '';

  // R U kiddin', man?
  if(wnd = 0) then exit;

  // get running OS
  ZeroMemory(@wv,sizeof(TOSVersionInfo));
  wv.dwOSVersionInfoSize := sizeof(TOSVersionInfo);
  GetVersionEx(wv);

  // get process ID
  GetWindowThreadProcessID(wnd,@pid);


  hProcess := CreateToolHelp32Snapshot(TH32CS_SNAPPROCESS,0);
  if(hProcess <> INVALID_HANDLE_VALUE) then try
    aProcessEntry32.dwSize := sizeof(aProcessEntry32);
    ContinueLoop := Process32First(hProcess,aProcessEntry32);

    while(ContinueLoop) do begin
      if(aProcessEntry32.th32ProcessID = pid) then begin
        ZeroMemory(@buf,sizeof(buf));
        lstrcpy(buf,aProcessEntry32.szExeFile);

        if(wv.dwPlatformId = VER_PLATFORM_WIN32_NT) then begin
          hp := OpenProcess(PROCESS_QUERY_INFORMATION or PROCESS_VM_READ,
            false,pid);

          if(hProcess <> INVALID_HANDLE_VALUE) then try
            ZeroMemory(@buf,sizeof(buf));
            GetModuleFileNameEx(hp,0,buf,sizeof(buf));
          finally
            CloseHandle(hp);
          end;
        end;

        break;
      end;

      ContinueLoop := Process32Next(hProcess,aProcessEntry32);
    end;
  finally
    CloseHandle(hProcess);
  end;

  Result := string(buf);
end;

end.					

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:

uses
  pathfinder;

procedure TForm1.Button1Click(Sender: TObject);
var
  notepad : HWND;
begin
  notepad := findwindow('notepad',nil);
  if(notepad <> 0) then
    ShowMessage(GetEXEFromHandle(notepad));

  // oder die eigene Anwendung
  // (obwohl "paramstr(0)" einfacher ist :))
  ShowMessage(GetEXEFromHandle(self.Handle));
end;