Option Explicit

'<lapis
Private Declare Function EnumProcesses Lib "PSAPI.DLL" (ByRef lpidProcess As Long, ByVal cb As Long, ByRef cbNeeded As Long) As Long
Private Declare Function OpenProcess Lib "kernel32.dll" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Private Declare Function GetModuleFileNameExA Lib "PSAPI.DLL" (ByVal hProcess As Long, ByVal hModule As Long, ByVal lpFilename As String, ByVal nSize As Long) As Long
Private Declare Function CloseHandle Lib "kernel32.dll" (ByVal hObject As Long) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Private Declare Function ShowWindow Lib "user32" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long
Private Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long, lpdwProcessId As Long) As Long
'lapis>

'<constantes
Private Const PROCESS_VM_READ As Long = (&H10)
Private Const PROCESS_QUERY_INFORMATION As Long = (&H400)
Private Const SW_SHOWNORMAL = 1
Private Const WM_CLOSE = &H10
'Private Const gcClassnameMSWord = "OpusApp"
'Private Const gcClassnameMSExcel = "XLMAIN"
'Private Const gcClassnameMSIExplorer = "IEFrame"
'Private Const gcClassnameMSVBasic = "wndclass_desked_gsk"
'Private Const gcClassnameNotePad = "Notepad"
'Private Const gcClassnameMyVBApp = "ThunderForm"
'Private Const gcClassnameFolder = CabinetWClass 'De explorer.exe
'constantes>

'procedimiento >>
Public Sub GetPathProces(Optional ClassName As String = vbNullString, Optional WindowsName As String = vbNullString)
   On Error GoTo eler
    
   Dim WinWnd As Long, ret As String, lpClassName As String
   Dim Buffer As String
   Dim i_Procesos As Long
   Dim Array_Procesos() As Long, RetVal As Long
   Dim sd As Long
   Dim ret1 As Long
   Dim Ruta As String
   Dim t_cbNeeded As Long
   Dim Handle_Proceso As Long
   Dim i As Long
    
   ReDim Array_Procesos(250) As Long
    
   ' Recoje el handle de la ventana
   WinWnd = FindWindow(vbNullString, ret)
    
   If WinWnd = 0 Then MsgBox "Couldn't find the window ...": Exit Sub
   lpClassName = Space(256)
   RetVal = GetClassName(WinWnd, lpClassName, 256)
   MsgBox "Classname: " + Left$(lpClassName, RetVal)
   ' Carga la variable sd con la id del proceso
   GetWindowThreadProcessId WinWnd, sd
    
   ' Obtiene un array con los id de los procesos
   ret = EnumProcesses(Array_Procesos(1), 1000, t_cbNeeded): i_Procesos = t_cbNeeded / 4
    
   ' Recorre todos los procesos
   For i = 1 To i_Procesos
    
    If Array_Procesos(i) = sd Then
     ' Lo abre y devuelve el handle
     Handle_Proceso = OpenProcess(PROCESS_QUERY_INFORMATION + PROCESS_VM_READ, 0, Array_Procesos(i))
        
     If Handle_Proceso <> 0 Then
      ' Crea un buffer para almacenar el nombre y ruta
      Buffer = Space(255)
      ' Le pasa el Buffer al Api y el Handle
      ret1 = GetModuleFileNameExA(Handle_Proceso, 0, Buffer, 255)
      ' Le elimina los espacios nulos a la cadena devuelta
      Ruta = Left(Buffer, ret1)
            
     End If
        
     ' Cierra el proceso abierto
     ret1 = CloseHandle(Handle_Proceso)
     ' Muestra la ruta del proceso y ee id
     MsgBox Ruta & "     " & Array_Procesos(i), vbInformation, "info"
             
    Exit For
      
   End If
     
   DoEvents
            
  Next
   
Exit Sub
eler:
MsgBox Err.Description, vbCritical, "Esto no tendria q haber pasado."

End Sub

Sub main()
GetPathProces , InputBox("Escriba el titulo de una ventana.", "prueva uno", "ej: Mi Pc", (Screen.Width / 2) - 2500, (Screen.Height / 2) - 1500)
End Sub

Option Explicit
Private Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long, lpdwprocessid As Long) As Long
Private Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Declare Function OpenProcess Lib "kernel32.dll" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
'Obtiene el nombre del proceso a partir de un handle
Private Declare Function GetModuleFileNameExA Lib "PSAPI.DLL" (ByVal hProcess As Long, ByVal hModule As Long, ByVal lpFilename As String, ByVal nSize As Long) As Long
Private Declare Function CloseHandle Lib "kernel32.dll" (ByVal hObject As Long) As Long
Private Const PROCESS_VM_READ As Long = (&H10)
Private Const PROCESS_QUERY_INFORMATION As Long = (&H400)

'Obtiene el Handle de una ventana a partir de una coordenada
Private Declare Function WindowFromPoint Lib "user32" (ByVal xPoint As Long, ByVal yPoint As Long) As Long
'Recupera la coordenada del cursor
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long

Private Type POINTAPI
  x As Long
  y As Long
End Type
Function ProcIDFromWnd(ByVal hwnd As Long) As Long

Dim idProc As Long
GetWindowThreadProcessId hwnd, idProc 'crea ID de un proceso desde un HWnd
ProcIDFromWnd = idProc 'retorno de la ID  de un proceso

End Function

Private Sub Form_Load()

Timer1.Interval = 100

End Sub

Private Sub Timer1_Timer()

Dim retorno As Long
Dim Handle As Long
Dim Cor As POINTAPI

'Obtiene la coordenada del Mouse
retorno = GetCursorPos(Cor)
'Recuperamos el HWND de la ventana asociada a esa coordenada
Handle = WindowFromPoint(Cor.x, Cor.y)

Dim Handle_Proceso As Long: Handle_Proceso = OpenProcess(&H400 + &H10, 0, ProcIDFromWnd(Handle))

If Handle_Proceso <> 0 Then
Dim Buffer As String: Buffer = Space(255) ' Crea un buffer para almacenar el nombre y ruta
Dim ret As Long: ret = GetModuleFileNameExA(Handle_Proceso, 0, Buffer, 255) ' pasa el Buffer al Api y el Handle
Dim Ruta As String: Ruta = Left(Buffer, ret) ' Le elimina los espacios nulos a la cadena devuelta
End If

ret = CloseHandle(Handle_Proceso) 'Cierra el proceso abierto

Me.Cls: Me.Print Ruta 'Muestra la ruta del proceso

End Sub