Question

I have created a COM library in c# which I am consuming from VBA in Excel.
My library has a property which returns an array of objects but when I try to access the elements of the array I get this compile error in VBA: “Wrong number of arguments or invalid property assignment”.

// C# property
Foo[] FooArray { get { return _fooArray; } }


' Client VBA code 
Dim obj as new Bar
Dim f as Foo
set f = obj.FooArray(0)

I tried returning an array of strings and saw the same error.

Answer 1

Dim f as Foo
set f = obj.FooArray(0)

Four mistakes here. FooArray is a property, not a function. The property doesn’t take an argument. Set is incorrect, the property returns an array, not an object. The type for f is wrong, the property returns an array, not a single Foo. This ought to be closer:

Dim f As Foo()
f = obj.FooArray