What is the difference between UuidToString, StringFromCLSID, StringFromIID, and StringFromGUID2?

Raymond Chen

November 13th, 20232 3

This is the counterpart article to What’s the difference between UuidFromString, IIDFromString, CLSIDFromString, GUIDFromString….

Here’s the table:

Function Output
Buffer management Character set support
Uuid­To­String xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
Free with Rpc­String­Free ANSI and Unicode
String­From­IID {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
Free with Co­Task­Mem­Free Unicode only
String­From­CLSID {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
Free with Co­Task­Mem­Free Unicode only
String­From­GUID2 {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
Provided by caller Unicode only

Since the size of a stringized GUID/UUID/IID is fixed, String­From­GUID2 is probably the most convenient function to use, since you can just have it generate the string into its final destination.

Raymond Chen

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2 comments

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  • Neil Rashbrook 0

    (The atom feed contains a leading newline, which makes the XML invalid.)

    (Edit: Since fixed, thank you!)

  • Solomon Ucko 0

    What’s the difference between 

    String­From­IID

    and 

    String­From­CLSID

    ?

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