Function iftrue(Fx, condition, show)
    iftrue = Application.WorksheetFunction.if(Fx & condition, show, Fx)
End Function

Function test(a, b)
    test = Application.WorksheetFunction.Sum(a, b)
End Function

Function testif(a, b, c)
    testif = Application.WorksheetFunction.if(a, b, c)
End Function