Re: CoCreateInstance bad variable type
"Sue" <jean.shu@gmail.com> wrote in message
news:1179982896.623949.120230@a26g2000pre.googlegroups.com
On May 23, 7:53 pm, "Igor Tandetnik" <itandet...@mvps.org> wrote:
"Sue" <jean....@gmail.com> wrote in message
news:1179971057.447823.25210@p77g2000hsh.googlegroups.com
I was trying to use CoCreateInstance and get a return result "bad
variable type". can anyone tell me what could be the cause of it?
How do I know if the COM component is registered OK? Thanks.
IHandler* pI;
HRESULT hr = CoCreateInstance(CLSID_Handler, NULL,
CLSCTX_INPROC_SERVER, IID_IHandler, (void**)&pI);
You are probably misinterpreting the HRESULT. What is the exact
numeric value you get from CoCreateInstance?
0x80020008.
This is indeed DISP_E_BADVARTYPE. I'm not sure why it would be returned
from CoCreateInstance. But see
http://groups.google.com/group/microsoft.public.platformsdk.com_ole/browse_frm/thread/f284391d000760b6
The poster there seems to have the same problem, and it was likely
caused by adding non-automation-compatible method to an automation
interface.
How is IHandler defined in the IDL? Do you get any warnings from MIDL
when this IDL file is compiled?
--
With best wishes,
Igor Tandetnik
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