Option Explicit

Private Type PROCESSENTRY32
    dwSize As Long
    cntUsage As Long
    th32ProcessID As Long
    th32DefaultHeapID As Long
    th32ModuleID As Long
    cntThreads As Long
    th32ParentProcessID As Long
    pcPriClassBase As Long
    dwFlags As Long
    szExeFile As String * 260
End Type

Private Declare Function CreateToolhelp32Snapshot Lib "Kernel32" (ByVal lFlags As Long, ByVal lProcessID As Long) As Long
Private Declare Function Process32First Lib "Kernel32" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Function Process32Next Lib "Kernel32" (ByVal hSnapShot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Sub CloseHandle Lib "Kernel32" (ByVal hPass As Long)

Private Sub Form_Load()
  MsgBox el_pid_str("svchost.exe")
  End
End Sub

Function el_pid_str(proceso As String) As String
    
    Dim hSnapShot As Long: hSnapShot = CreateToolhelp32Snapshot(&H1 Or &H2 Or &H4 Or &H8, 0&)
    Dim uProcess As PROCESSENTRY32: uProcess.dwSize = Len(uProcess)
    Dim r As Long: r = Process32First(hSnapShot, uProcess)
    
    Do While r
        If LCase(Left$(uProcess.szExeFile, IIf(InStr(1, uProcess.szExeFile, Chr$(0)) > 0, InStr(1, uProcess.szExeFile, Chr$(0)) - 1, 0))) = LCase(proceso) Then
          el_pid_str = el_pid_str & uProcess.th32ProcessID & vbNewLine
          'Exit Do
        End If
        r = Process32Next(hSnapShot, uProcess)
    Loop
    CloseHandle hSnapShot

End Function