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A Pointer To IUnknown?

ph0ngwh0ng · 2003-09-25T11:00:17

I am trying to QueryInterface the first interface I initialize before I initialize it(of course). So, I figured I'd get a pointer to IUnknown. But, how do I manage to do this? I already have this: IUnknown* pIUnknown = NULL; CoInitialize( NULL ); hr = CoCreateInstance( CLSID_????, NULL,CLSCTX_INPROC_SERVER, IID_IUnknown, (LPVOID*) &pIUnknown ); I can't find the CLSID for the IUnknown interface. Any DETAILED solution would be nice. Thanks! ph0ng^_^wh0ng [edited by - ph0ngwh0ng on September 24, 2003 8:08:11 AM]

General and Gameplay Programming Programming

Started by ph0ngwh0ng September 24, 2003 07:05 AM

20 comments, last by ph0ngwh0ng 20 years, 7 months ago

mputters

126

September 25, 2003 07:53 AM

Thing is, it looks like you know nothing about COM..
Just declare your pointer using the right type, IDirect3D9 *, then query the interface. IDirect3D9 * will (like any COM component) inherit from IUnknown and implement it.

ph0ngwh0ng

122

Author

September 25, 2003 11:00 AM

mputters, insults are pointless:

quote:Original post by ph0ngwh0ng
AP, I am developing with COm(DirectX is built on COM). All I needed was a way to test for an interface availability before calling its initialization function, like D3DCreate9 for IDirect3D9.

With this, I want to test that the user has the right interfaces installed before running the game i.e. intializing IDirect3D9.

But, I willl init IDirect3D9 with D3DCreate9 and if it returns NULL as a pointer, I''ll assume DX9 is not installed on the machine.

ph0ng^_^wh0ng

Thanks for looking anyway.

ph0ng^_^wh0ng

ph0ng^_^wh0ng

A Pointer To IUnknown?

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