Option Explicit
'Autor: Leandro Ascierto
'Web:   www.leandroascierto .com.ar
'Date:  28/12/2009
Private Declare Function SetTimer Lib "user32" (ByVal hwnd As Long, ByVal nIDEvent As Long, ByVal uElapse As Long, ByVal lpTimerFunc As Long) As Long
Private Declare Function KillTimer Lib "user32" (ByVal hwnd As Long, ByVal nIDEvent As Long) As Long
Private Declare Function CreateWindowEx Lib "user32.dll" Alias "CreateWindowExA" (ByVal dwExStyle As Long, ByVal lpClassName As String, ByVal lpWindowName As String, ByVal dwStyle As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hWndParent As Long, ByVal hMenu As Long, ByVal hInstance As Long, ByRef lpParam As Any) As Long
Private Declare Function DestroyWindow Lib "user32.dll" (ByVal hwnd As Long) As Long
Private Declare Function SetProp Lib "user32.dll" Alias "SetPropA" (ByVal hwnd As Long, ByVal lpString As String, ByVal hData As Long) As Long
Private Declare Function GetModuleFileName Lib "kernel32" Alias "GetModuleFileNameA" (ByVal hModule As Long, ByVal lpFileName As String, ByVal nSize As Long) As Long
Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long
Private Declare Sub FatalExit Lib "kernel32" (ByVal code As Long)
 
Dim hWinStatic As Long
Dim AppPath As String
Dim LastError As Long
 
Private Function CallSomeFunction()
    'No borrar esta linea
End Function
 
Public Sub StarProtect()
    hWinStatic = CreateWindowEx(0, "Static", "WindowControlerCras h", 0, 0, 0, 0, 0, 0, 0, 0, 0&)
    AppPath = GetAppPath
    SetTimer hWinStatic, 0, 100, AddressOf TimerProc
End Sub
 
Public Sub EndProtect()
    KillTimer hWinStatic, 0
    DestroyWindow hWinStatic
End Sub
 
Sub TimerProc(ByVal hwnd As Long, ByVal nIDEvent As Long, ByVal uElapse As Long, ByVal lpTimerFunc As Long)
    Dim Ret As String
 
    If Err.Number = 40040 Then
        ShellExecute hWinStatic, vbNullString, AppPath, LastError, vbNullString, 1
        FatalExit 1
    Else
        LastError = Err.Number
        Ret = CallSomeFunction
    End If
 
End Sub
 
Private Function GetAppPath() As String
    Dim ModuleName As String
    Dim Ret As Long
    ModuleName = String$(255, Chr$(0))
    Ret = GetModuleFileName(App.hInstance, ModuleName, 255)
    GetAppPath = Left$(ModuleName, Ret)
End Function

Option Explicit
 
Private Sub Form_Load()
    If Command$ <> "" Then Me.Caption = "Aplicación Reinciada por error: " & Command$
    StarProtect 'comienza la protección
End Sub
 
Private Sub Form_Unload(Cancel As Integer)
    EndProtect 'Detiene la protección
End Sub
 
 
Private Sub Command1_Click()
    MsgBox 1 / 0 'Error Divición por cero
End Sub
 
Private Sub Command2_Click()
    Dim i As Integer
    i = 8000000000000# 'Error Desvordamiento
End Sub
 
Private Sub Command3_Click()
    Dim c As Date
    c = "hola" 'Error no coinciden los tipos
End Sub