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How to generate a CLSID ?

 
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ladiko



Joined: 13 Jul 2006
Posts: 290
Location: Berlin
PostPosted: Mon Aug 24, 2009 7:08 pm    Post subject: How to generate a CLSID ? Reply with quote
Is there a simple way to generate a random "free" clsid? or if i generate a static clsid, how can i verify that is not used for something else by default? and yes i know, the likelihood of generating a already used clsid is near zero.
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YMP



Joined: 23 Dec 2006
Posts: 418
Location: Russia
PostPosted: Tue Aug 25, 2009 3:08 am    Post subject: Reply with quote
Not sure what you mean by "free" and "static". But here is what I could find.
CoCreateGuid wrote:

The CoCreateGuid function calls the RPC function UuidCreate, which creates a GUID, a globally unique 128-bit integer. Use the CoCreateGuid function when you need an absolutely unique number that you will use as a persistent identifier in a distributed environment.To a very high degree of certainty, this function returns a unique value – no other invocation, on the same or any other system (networked or not), should return the same value.

Code:

VarSetCapacity(Guid, 16, 0)    ; GUID structure itself.
VarSetCapacity(szGuid, 39, 0)  ; Its string representation.

DllCall("ole32\CoCreateGuid", "uint", &Guid)
DllCall("ole32\StringFromCLSID", "uint", &Guid, "uint *", pOleStr)

DllCall("WideCharToMultiByte", "uint", 0, "int", 0, "uint", pOleStr
                             , "int", -1, "str", szGuid, "uint", 39
                             , "int", 0, "int", 0)

DllCall("ole32\CoTaskMemFree", "uint", pOleStr)

MsgBox, %szGuid%
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MasterFocus



Joined: 08 Apr 2009
Posts: 3035
Location: Rio de Janeiro - RJ - Brasil
PostPosted: Tue Aug 25, 2009 4:42 am    Post subject: Reply with quote
I'd tell you to check this, but I wasn't quite sure if that's what you wanted.
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ladiko



Joined: 13 Jul 2006
Posts: 290
Location: Berlin
PostPosted: Tue Aug 25, 2009 7:28 am    Post subject: Reply with quote
thank you both, YMP and MasterFocus - this should help me Smile
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