Implicit conversion with ctor like C++

[Pierre via Digitalmars-d-learn]

Hi everybody,

I would like to use implicit conversion like this:
//Sample class
class MyClass
{
   this(string MyValue){...}
}

//Called function
void MyFunction(Foo MyFoo){}

void main()
{
  MyFunction("Hello World!"); //Failed : MyFunction not 
callable...
}

I saw in forum this is OK because D doesn't do implicit 
conversion with ctor like C++
But how can I do ? May I use alias ?

Thank you for your attention.