Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
MS’ docs simply say:
Given a ProgID, CLSIDFromProgID looks up its associated CLSID in the
registry.
But where exactly does it look? I have a weird issue where a wrong CLSID is being returned and I want to follow where this function is looking to help narrow down where the problem is.
The lookup goes through the application’s manifest and its dependant assembly manifests. This is done to support registration-free COM.
If there’s no application manifest or if none of the dependant assembly manifests declare your class in a
comClassorclrClassXML element, the lookup defaults to the registry, which will checkHKEY_CLASSES_ROOT\<ProgID>1 with a string value namedCLSID.1.
HKEY_CLASSES_ROOTis a mix ofHKEY_CURRENT_USER\Software\ClassesandHKEY_LOCAL_MACHINE\Software\Classes.