[Qt-interest] How to find a key presence in regedit?

[Santhosh Y]

Hi,

When I build a com server as part of post-build event it gets registered 
in the registry.

I can see the CLSIDs specific to COM gets registered in the registry in 
the following path.
*My Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\*

And the above com server is invoked in some other exe. /*Before one 
invokes the com server, if somebody unregister the above server,
then some unknown exceptions are happening.*/

I would like to detect whether the keys specific to classes exposed as  
COM objects are present in the above path, before user invokes com 
server in the second application.

How to do this?

I have written following code snippet for detecting it; But it is not 
working. Can you help me how to do the same.

===================================
bool     isApplicationRegistered ()
{
     QSettings s;
     s.beginGroup("My 
Computer\\HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\CLSID\\");

     bool toolbar = s.contains 
(QString("{3F3C28E3-5A54-4ec2-81C0-D2FC3B10253D}")); *// class 
DatToolBarObj*
     bool menubar = s.contains 
(QString("{D71F00BA-45E9-493c-98EE-DB5DEEBE1BE3}")); *// class 
DatMenuBarObj*
     bool configObj = s.contains 
(QString("{DADB29F8-E91F-4974-8787-6262653CF828}")); *// class DatConfigObj*
     bool handlerObj = s.contains 
(QString("{FC76AF01-5A8C-41ef-A941-237F6B930803}")); *// class 
DatHandlerObj*

     s.endGroup ();

     return (toolbar && menubar && configObj && handlerObj);
}
=================================================
When I do the above, it is returning false for all the keys when they 
are present. Why this is happening?
Please tell me any better or correct way,  to know whether a key is 
present in the registry.

Regards,
Santhosh.

-- 
----------------------------------------------------
Y Santhosh Kumar -
Senior Software Engineer,
SoftJin Technologies Pvt Ltd,
www.softjin.com
----------------------------------------------------



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