Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const WM_SETTEXT = &HC

Dim Wnd As Long, tWnd As Long

Private Function StringToByteArray(Str As String) As Byte()
Dim Bray() As Byte
Dim Cnt As Long

ReDim Bray(Len(Str))

For Cnt = 0 To Len(Str) - 1
    Bray(Cnt) = Asc(Mid(Str, Cnt + 1, 1))
Next Cnt

StringToByteArray = Bray
End Function

Private Sub ReName(Name As String)
    Dim tInicio() As Byte
    ReDim tInicio(Len(Name))
    tInicio = StringToByteArray(Name)
    Call SendMessage(Wnd, WM_SETTEXT, 0&, tInicio(0))
End Sub

Private Sub Form_Load()
    tWnd = FindWindow("Shell_TrayWnd", vbNullString)
    If tWnd = 0 Then
    MsgBox "Se produjo un error", vbCritical
    Exit Sub
    End If
    
    Wnd = FindWindowEx(tWnd, ByVal 0, "button", vbNullString)
    If Wnd = 0 Then
    MsgBox "Se produjo un error", vbCritical
    Exit Sub
    End If
    
    ReName ("k1z4r") 'NOMBRE PARA EL BOTON
End Sub