WIA

I am looking for a simple working example in wia to use the following function: pWiaDevMgr->RegisterEventCallbackCLSID

I need my program to be called when a camera is plugged in and the button is clicked.

I use WIA_EVENT_ITEM_CREATED. This works with RegisterEventCallbackInterface.

This will call my program (calls ImageEventCallback). This works, but the application has to be running. I want my program to be called even if it is not running. I understand if I use RegisterEventCallbackCLSID, this will do what I need. Can anyone help me.

@crupib: Is it not working as intended?

http://msdn.microsoft.com/en-us/library/ms630145(VS.85).aspx">http://msdn.microsoft.com/en-us/library/ms630145(VS.85).aspx

@spivonious:No it is not. The links you sent me are not working examples of the these functions.

I can't find any examples anywhere.

@crupib:

I understand why this won't be any more helpful than the API docs but I couldn't resist:

Example

No it is no help. I am just wondering if any one has done this.

I need an example of how this all works together.

Does anyone have an working example. I can read the doc as bad as it is.

It does show how to use it. None of the SDK examples use this function:

RegisterEventCallbackCLSID

So I need a little help.

OK, I am using the getimage sample from the sdk samples. I want to change the

the following with:

 hr = pWiaDevMgr->RegisterEventCallbackInterface(
        0,
        NULL,
        &WIA_EVENT_DEVICE_DISCONNECTED,
        this,
        &m_pDisconnectEventObject
    );

I need the to know what information needs to be put into the

HRESULT RegisterEventCallbackCLSID(
  [in]  LONG lFlags,
  [in]  BSTR bstrDeviceID,
  [in]  const GUID *pEventGUID,
  [in]  const GUID *pClsID,
  [in]  BSTR bstrName,
  [in]  BSTR bstrDescription,
  [in]  BSTR bstrIcon
);

Function.
How do I set up a pClsID?
This is the information I used. It does not work.
I found this on the internet:

IWiaDevMgr *pWiaDevMgr = NULL;
			HRESULT hr;
			
			::CoInitialize(NULL);
			
			if( (hr = ::CoCreateInstance(CLSID_WiaDevMgr, NULL, CLSCTX_LOCAL_SERVER, 
                             IID_IWiaDevMgr, (void**)&pWiaDevMgr )) == S_FALSE)
			{				
				return hr;
			}
			CLSID appId ={0,};
// will a guid I generate be able to use in the following.

if(CLSIDFromString(OLESTR("{DBFBB272-B295-44AF-932C-AF5DAF5FF901}"),&appId) != NOERROR)
{		
}
wchar_t pAppName[] = L"Sample01";
wchar_t pArg[] = "what goes here the name of my executable?"
wchar_t pIcon[] = L"test3, 0";			
wchar_t pAstrick[] = L"*";
wchar_t pAppDescript[] = L"THIS SAMPLE PROGRAM";
GUID guid = WIA_EVENT_ITEM_CREATED;

hr = pWiaDevMgr->RegisterEventCallbackCLSID(WIA_REGISTER_EVENT_CALLBACK,
			SysAllocString(pAstrick),
			&guid, 
			&appId,
			SysAllocString(pArg),
	        	SysAllocString(pAppDescript),
			SysAllocString(pIcon));		
if(FAILED(hr))
{
		return hr;
}			

If your app is COM registered, then you know the CLSID for it. Check the registry.

If it's not a COM application, you can't use this API.

This is a com application. Where in the registry do I look.

And no one is answering my questions. Please check the code in previous replies.

This is not Vista it is XP.

@crupib: Search for your class name under HKEY_CLASSES_ROOT\CLSID\. The GUID that it's under is your CLSID.

How to I link to events when a wia device produces them.

Do I run the

hr = pWiaDevMgr->RegisterEventCallbackCLSID(WIA_REGISTER_EVENT_CALLBACK,
			SysAllocString(pAstrick),
			&guid, 
			&appId,
			SysAllocString(pArg),
	        	SysAllocString(pAppDescript),
			SysAllocString(pIcon));		
Command as part of the register of the com object?

@crupib: I don't know. I'd run it as part of an installer. I'd imagine that you'd need to finish the COM registering before calling the method.

I would like to thank everyone for your help.

I had to learn a lot about com+, WIA, ATL, etc...

I think I am almost there. I will upload the code after tonight.

The summary of what I did was create a ATL exe which is a com+. It implements

the WIA function. As part of the init of installing this com+. I added the WIA registration.

It was late last night so I did not test. I will tonight. If it works woo hoo. If not I will

as I already said upload my code.

Where is the info for wia events stored in the registry?