Description:
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In visual basic it is possible to declare a variable as a pointer to a certain type of object, but not instanciate it yet.

I have run into a problem using a 3rd party COM library, where it is neccessary to pass such an empty pointer by ref to a method, in order to get an instance or another class.

Reproduce code:
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// This code is not real, it's just to illustrate the problem:

$factory = new COM('Example.Factory');

// Here we have several options, none of which work:
$product = new VARIANT;
$product = new COM('Example.Product');
variant_set_type($product, VT_EMPTY);

// Whatever I have done in the previous lines, this method fails. If it gets an instance of an instance of an object - it fails. If it gets anything that is not of type Example.Product, it fails.
$factory->Create_Product($product);

Expected result:
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Here is the "equivalent" VB code that works:

Dim objFactory As Example.Factory
Dim objProduct As Example.Product
// Any of these would fail:
Dim objProduct As New Example.Product
Dim objProduct As Variant

Sub Main()
    Set objFactory = new Example.Factory
    objFactory.Create_Product(objProduct)
End Sub

Actual result:
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The Create_Product method will fail if it does not recieve the equivalent of the line: "Dim objProduct As Example.Product". Which as far as I can understand, is not possible to supply it with at this point.