SetupDiClassGuidsFromNameExA function (setupapi.h)
The SetupDiClassGuidsFromNameEx function retrieves the GUIDs associated with the specified class name. This resulting list contains the classes currently installed on a local or remote computer.
Syntax
WINSETUPAPI BOOL SetupDiClassGuidsFromNameExA(
[in] PCSTR ClassName,
[out] LPGUID ClassGuidList,
[in] DWORD ClassGuidListSize,
[out] PDWORD RequiredSize,
[in, optional] PCSTR MachineName,
PVOID Reserved
);
Parameters
[in] ClassName
The name of the class for which to retrieve the class GUIDs.
[out] ClassGuidList
A pointer to an array to receive the list of GUIDs associated with the specified class name.
[in] ClassGuidListSize
The number of GUIDs in the ClassGuidList array.
[out] RequiredSize
A pointer to a variable that receives the number of GUIDs associated with the class name. If this number is greater than the size of the ClassGuidList buffer, the number indicates how large the array must be in order to store all the GUIDs.
[in, optional] MachineName
A pointer to a NULL-terminated string that contains the name of a remote system from which to retrieve the GUIDs. This parameter is optional and can be NULL. If MachineName is NULL, the local system name is used.
Caution
Using this function to access remote machines is not supported beginning with Windows 8 and Windows Server 2012, as this functionality has been removed.
Reserved
Must be NULL.
Return value
The function returns TRUE if it is successful. Otherwise, it returns FALSE and the logged error can be retrieved by making a call to GetLastError.
Remarks
Class names are not guaranteed to be unique; only GUIDs are unique. Therefore, one class name can return more than one GUID.
Note
The setupapi.h header defines SetupDiClassGuidsFromNameEx as an alias that automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Microsoft Windows 2000 and later versions of Windows. |
| Target Platform | Desktop |
| Header | setupapi.h (include Setupapi.h) |
| Library | Setupapi.lib |