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Level 4

RegDBKeyExist not working

I have a registry entry as below

szKey = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Installer\\UserData\\S-1-5-18\\Products\\00004109610090400000000000F01FEC";
nResult = RegDBKeyExist(szKey);

In my registry, the above key exists. But the value returned is -1. If I search for key exists till 'products', it returns 1 properly. The product key is spelled right, because I copied from registry. What could be the problem?

Please leave your inputs
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Level 4

I found the problem.

Actually I was searching for a 64 bit key in 32 bit path. That's why the search results shows wrong result.
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