ActiveX component can't create object

DrLargePants · Joined: 04 Oct 2007 Posts: 1

Any ideas why something like

Dim test As MyLib.MyClass
Set test = new MyLib.MyClass

Works fine, but

Dim test as object
Set test = createobject("MyLib.MyClass")

Fails with "ActiveX component can't create object"

Archived from group: microsoft>public>vb>ole>automation

Ralph · Joined: 04 Oct 2007 Posts: 4148

"DrLargePants" wrote in message@q75g2000hsh.googlegroups.com...
> Any ideas why something like
>
> Dim test As MyLib.MyClass
> Set test = new MyLib.MyClass
>
> Works fine, but
>
> Dim test as object
> Set test = createobject("MyLib.MyClass")
>
> Fails with "ActiveX component can't create object"
>

Most likely because the ProgID "MyLib.MyClass" is not registered or the
registration of the ClsID contains a different ProgID.

While both arguments appear identical for the Declaration and the
CreateObject Call they are not the same thing.
In ...
Dim test As MyLib.MyClass
"MyLib.MyClass" will be resolved to the identifier in the typelib that you
referenced. Note: No quotes - it is an type identifier.
In ...
CreateObject("MyLib.MyClass")
"MyLib.MyClass" will be resolved to the ProgID registered by that name in
the Registry. Note the quotes - it is a string.

This will become clearer if you open RegEdit and then search for
"MyLib.MyClass". You should see it defined under Hkey...\Classes\ and
Hkey...\ProgID. Or rather in your case you will likely find some
descrepancy.

Related to the above, you can experience this if you wrote the COM component
and failed to provide a Dual or IDispatch inteface.

-ralph