Dim WithEvents IE As InternetExplorer
Dim WithEvents inputEle As HTMLInputElement
Dim HTMLdoc As HTMLDocument

Private Sub Comando0_Click()
    Dim URL As String
    URL = "www.mkplata.es"

    Set IE = CreateObject("InternetExplorer.Application")
    IE.Visible = True
    
    IE.Navigate URL
    
    '.. Wait while IE loading...
    Do While IE.ReadyState = 4: DoEvents: Loop
    Do Until IE.ReadyState = 4: DoEvents: Loop
    
    Set HTMLdoc = IE.Document
    
    '.. INTENTO DE HACER CLICK SIN ÉXITO
    'Set inputEle = HTMLdoc.getElementById("st_ma_13").Click
    'Set inputEle = HTMLdoc.getElementsByClassName("st_ma_13")(0).Click
    'Set inputEle = HTMLdoc.querySelector("id=st_ma_13]").Click()
    'Set inputEle = HTMLdoc.getElementsByTagName("st_ma_13").Item ' .Click()
    'Set inputEle = HTMLdoc.getElementsByClassName("st_ma_13").Click
    
    
    Set IE = Nothing
End Sub