"Henning M" <henn***@fys.ku.dk> wrote in message
news:38bf7$44366247$3e3d8433$21013@news.arrownet.dk...
> Hej All
>
> Im relativ new to VB.net and im trying to collect som device information
> using cfgmgr32.dll
>
> I use  - Declare Function GetListLength Lib "cfgmgr32.dll" Alias
> "CM_Get_Device_ID_List_SizeA" (ByRef pulLen As Integer, ByVal pszFilter As
> Integer, ByVal UlFlags As Integer) As Integer -
> To get the length of the device list. This seems to work as I get a
> CR_SUCCESS (I get a number around 8500. But as I'm not sure what is in the
> list I do not know if this is a valid number)
>
> The problem arisis when I want to retrive the list itself..
>
> MSDN:
> CM_Get_Device_ID_List(
>    IN PCTSTR  pszFilter,  OPTIONAL
>    OUT PTCHAR  Buffer,
>    IN ULONG  BufferLen,
>    IN ULONG  ulFlags
>    );
>
> I can't get this to work, neighter the declaration or the call of the
> function :( I have tried everything I know (and could find on the net) but
> it all crashses or give no information.
> To the best of my knowledge there are no thing like pointers in vb and as
> I read this, it gives you a pointer..?!?
>
> Anyone out there thet can show how to retrive the list or an example that
> explains the workings of functions like this?
>
> Hope someone out there can help.
>
> Thanks
>  Henning
>
>
> ------------------------------------------------------------FULL MSDN
> INFORMATION----------------------------------------------------------------------
> -------http://msdn.microsoft.com/library/default.asp?url=/library/en-us/DevInst_r/hh/DevInst_r/cfgmgrfn_e9f614d2-9bac-4b30-b9a0-f0764e37950b.xml.asp------
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> CM_Get_Device_ID_List
> The CM_Get_Device_ID_List function retrieves a list of device instance IDs
> for the local machine's device instances.
>
> CMAPI CONFIGRET WINAPI
>  CM_Get_Device_ID_List(
>    IN PCTSTR  pszFilter,  OPTIONAL
>    OUT PTCHAR  Buffer,
>    IN ULONG  BufferLen,
>    IN ULONG  ulFlags
>    );
>
> Parameters
> pszFilter
> Caller-supplied pointer to a character string specifying a subset of the
> machine's device instance identifiers, or NULL. See the following
> description of ulFlags.
> Buffer
> Address of a buffer to receive a set of NULL-terminated device instance
> identifier strings. The end of the set is terminated by an extra NULL. The
> required buffer size should be obtained by calling
> CM_Get_Device_ID_List_Size.
> BufferLen
> Caller-supplied length, in characters, of the buffer specified by Buffer.
> ulFlags
> One of the optional, caller-supplied bit flags, listed in the following
> table, which specify search filters. If no flags are specified, the
> function returns all device instance IDs for all device instances.
> CM_GETIDLIST_FILTER_ENUMERATOR
>
> If this flag is set, pszFilter must specify the name of a device
> enumerator, optionally followed by a device identifier. The string format
> is EnumeratorName\<DeviceID>, such as ROOT or ROOT\*PNP0500.
> If pszFilter supplies only an enumerator name, the function returns device
> instance IDs for the instances of each device associated with the
> enumerator. Enumerator names can be obtained by calling
> CM_Enumerate_Enumerators.
>
> If pszFilter supplies both an enumerator and a device ID, the function
> returns device instance IDs only for the device instances of the specified
> device, associated with the enumerator.
>
> CM_GETIDLIST_FILTER_SERVICE
>
> If this flag is set, pszFilter must specify the name of a Windows service
> (typically a driver). The function returns device instance IDs for the
> device instances controlled by the specified service.
> Note that if the device tree does not contain a device node for the
> specified service, this function creates one by default. To inhibit this
> behavior, also set CM_GETIDLIST_DONOTGENERATE.
>
> CM_GETIDLIST_FILTER_EJECTRELATIONS
>
> If this flag is set, pszFilter must specify a device name. The function
> returns device instance IDs for the ejection relations of the specified
> device instance.
> CM_GETIDLIST_FILTER_REMOVALRELATIONS
>
> If this flag is set, pszFilter must specify a device name. The function
> returns device instance IDs for the removal relations of the specified
> device instance.
> CM_GETIDLIST_FILTER_POWERRELATIONS
>
> Not used.
> CM_GETIDLIST_FILTER_BUSRELATIONS
>
> Not used.
> CM_GETIDLIST_DONOTGENERATE
>
> Used only with CM_GETIDLIST_FILTER_SERVICE. If set, and if the device tree
> does not contain a device node for the specified service, this flag
> prevents the function from creating a device node for the service.
>
>
> Return Value
> If the operation succeeds, the function returns CR_SUCCESS. Otherwise, it
> returns one of the CR_-prefixed error codes defined in cfgmgr32.h.
>
> Headers
> Declared in cfgmgr32.h. Include cfgmgr32.h.
>
> Comments
> For information about device instance IDs, see Device Identification
> Strings.
>
>

"Claes Bergefall" <louplou@nospam.nospam> wrote in message
news:%23gAsbIlWGHA.2080@TK2MSFTNGP05.phx.gbl...
> The recommended way to pass string buffers when using P/Invoke is to use a
> StringBuilder object
> Something like this should work (watch out for line breaks)
>
> Declare Auto Function CM_Get_Device_ID_List_Size Lib "cfgmgr32.dll" Alias
> (ByRef pulLen As Integer, ByVal pszFilter As String, ByVal ulFlags As
> Integer) As Integer
>
> Declare Auto Function CM_Get_Device_ID_List Lib "cfgmgr32.dll" (ByVal
> pszFilter As String, ByVal ptChar As System.Text.StringBuilder, ByVal
> bufferLen As Integer, ByVal ulFlags As Integer) As Integer
>
> Dim filter As String  ' TODO: Initialize
> Dim flags As Integer  ' TODO: Initialize
> Dim len As Integer
> CM_Get_Device_ID_List_Size(len, filter, flags)
>
> Dim sb As New StringBuilder(len + 1)
> CM_Get_Device_ID_List(filter, sb, sb.Capacity, flags)
>
>
>   /claes
>
>
>
> "Henning M" <henn***@fys.ku.dk> wrote in message
> news:38bf7$44366247$3e3d8433$21013@news.arrownet.dk...
>> Hej All
>>
>> Im relativ new to VB.net and im trying to collect som device information
>> using cfgmgr32.dll
>>
>> I use  - Declare Function GetListLength Lib "cfgmgr32.dll" Alias
>> "CM_Get_Device_ID_List_SizeA" (ByRef pulLen As Integer, ByVal pszFilter
>> As Integer, ByVal UlFlags As Integer) As Integer -
>> To get the length of the device list. This seems to work as I get a
>> CR_SUCCESS (I get a number around 8500. But as I'm not sure what is in
>> the list I do not know if this is a valid number)
>>
>> The problem arisis when I want to retrive the list itself..
>>
>> MSDN:
>> CM_Get_Device_ID_List(
>>    IN PCTSTR  pszFilter,  OPTIONAL
>>    OUT PTCHAR  Buffer,
>>    IN ULONG  BufferLen,
>>    IN ULONG  ulFlags
>>    );
>>
>> I can't get this to work, neighter the declaration or the call of the
>> function :( I have tried everything I know (and could find on the net)
>> but it all crashses or give no information.
>> To the best of my knowledge there are no thing like pointers in vb and as
>> I read this, it gives you a pointer..?!?
>>
>> Anyone out there thet can show how to retrive the list or an example that
>> explains the workings of functions like this?
>>
>> Hope someone out there can help.
>>
>> Thanks
>>  Henning
>>
>>
>> ------------------------------------------------------------FULL MSDN
>> INFORMATION----------------------------------------------------------------------
>> -------http://msdn.microsoft.com/library/default.asp?url=/library/en-us/DevInst_r/hh/DevInst_r/cfgmgrfn_e9f614d2-9bac-4b30-b9a0-f0764e37950b.xml.asp------
>> --------------------------------------------------------------------------------------------------------------------------------------------------------------------
>>
>> CM_Get_Device_ID_List
>> The CM_Get_Device_ID_List function retrieves a list of device instance
>> IDs for the local machine's device instances.
>>
>> CMAPI CONFIGRET WINAPI
>>  CM_Get_Device_ID_List(
>>    IN PCTSTR  pszFilter,  OPTIONAL
>>    OUT PTCHAR  Buffer,
>>    IN ULONG  BufferLen,
>>    IN ULONG  ulFlags
>>    );
>>
>> Parameters
>> pszFilter
>> Caller-supplied pointer to a character string specifying a subset of the
>> machine's device instance identifiers, or NULL. See the following
>> description of ulFlags.
>> Buffer
>> Address of a buffer to receive a set of NULL-terminated device instance
>> identifier strings. The end of the set is terminated by an extra NULL.
>> The required buffer size should be obtained by calling
>> CM_Get_Device_ID_List_Size.
>> BufferLen
>> Caller-supplied length, in characters, of the buffer specified by Buffer.
>> ulFlags
>> One of the optional, caller-supplied bit flags, listed in the following
>> table, which specify search filters. If no flags are specified, the
>> function returns all device instance IDs for all device instances.
>> CM_GETIDLIST_FILTER_ENUMERATOR
>>
>> If this flag is set, pszFilter must specify the name of a device
>> enumerator, optionally followed by a device identifier. The string format
>> is EnumeratorName\<DeviceID>, such as ROOT or ROOT\*PNP0500.
>> If pszFilter supplies only an enumerator name, the function returns
>> device instance IDs for the instances of each device associated with the
>> enumerator. Enumerator names can be obtained by calling
>> CM_Enumerate_Enumerators.
>>
>> If pszFilter supplies both an enumerator and a device ID, the function
>> returns device instance IDs only for the device instances of the
>> specified device, associated with the enumerator.
>>
>> CM_GETIDLIST_FILTER_SERVICE
>>
>> If this flag is set, pszFilter must specify the name of a Windows service
>> (typically a driver). The function returns device instance IDs for the
>> device instances controlled by the specified service.
>> Note that if the device tree does not contain a device node for the
>> specified service, this function creates one by default. To inhibit this
>> behavior, also set CM_GETIDLIST_DONOTGENERATE.
>>
>> CM_GETIDLIST_FILTER_EJECTRELATIONS
>>
>> If this flag is set, pszFilter must specify a device name. The function
>> returns device instance IDs for the ejection relations of the specified
>> device instance.
>> CM_GETIDLIST_FILTER_REMOVALRELATIONS
>>
>> If this flag is set, pszFilter must specify a device name. The function
>> returns device instance IDs for the removal relations of the specified
>> device instance.
>> CM_GETIDLIST_FILTER_POWERRELATIONS
>>
>> Not used.
>> CM_GETIDLIST_FILTER_BUSRELATIONS
>>
>> Not used.
>> CM_GETIDLIST_DONOTGENERATE
>>
>> Used only with CM_GETIDLIST_FILTER_SERVICE. If set, and if the device
>> tree does not contain a device node for the specified service, this flag
>> prevents the function from creating a device node for the service.
>>
>>
>> Return Value
>> If the operation succeeds, the function returns CR_SUCCESS. Otherwise, it
>> returns one of the CR_-prefixed error codes defined in cfgmgr32.h.
>>
>> Headers
>> Declared in cfgmgr32.h. Include cfgmgr32.h.
>>
>> Comments
>> For information about device instance IDs, see Device Identification
>> Strings.
>>
>>
>
>

"Henning M" <henn***@fys.ku.dk> wrote in message
news:cd1f1$4436900e$3e3d8433$2140@news.arrownet.dk...
> Thanks a lot, this works if I only need the first item in the list.
> The stringbuilder only reads till the first NULL value.
>
> Is it possible to configure the StringBuilder to use a double NULL value
> as string termination.
> I found nothing of the kind in the list of StringBuilder Members :(
>
> Are there any other way of manually cyclinging trough the list?
>
> /Henning
>
> "Claes Bergefall" <louplou@nospam.nospam> wrote in message
> news:%23gAsbIlWGHA.2080@TK2MSFTNGP05.phx.gbl...
>> The recommended way to pass string buffers when using P/Invoke is to use
>> a StringBuilder object
>> Something like this should work (watch out for line breaks)
>>
>> Declare Auto Function CM_Get_Device_ID_List_Size Lib "cfgmgr32.dll" Alias
>> (ByRef pulLen As Integer, ByVal pszFilter As String, ByVal ulFlags As
>> Integer) As Integer
>>
>> Declare Auto Function CM_Get_Device_ID_List Lib "cfgmgr32.dll" (ByVal
>> pszFilter As String, ByVal ptChar As System.Text.StringBuilder, ByVal
>> bufferLen As Integer, ByVal ulFlags As Integer) As Integer
>>
>> Dim filter As String  ' TODO: Initialize
>> Dim flags As Integer  ' TODO: Initialize
>> Dim len As Integer
>> CM_Get_Device_ID_List_Size(len, filter, flags)
>>
>> Dim sb As New StringBuilder(len + 1)
>> CM_Get_Device_ID_List(filter, sb, sb.Capacity, flags)
>>
>>
>>   /claes
>>
>>
>>
>> "Henning M" <henn***@fys.ku.dk> wrote in message
>> news:38bf7$44366247$3e3d8433$21013@news.arrownet.dk...
>>> Hej All
>>>
>>> Im relativ new to VB.net and im trying to collect som device information
>>> using cfgmgr32.dll
>>>
>>> I use  - Declare Function GetListLength Lib "cfgmgr32.dll" Alias
>>> "CM_Get_Device_ID_List_SizeA" (ByRef pulLen As Integer, ByVal pszFilter
>>> As Integer, ByVal UlFlags As Integer) As Integer -
>>> To get the length of the device list. This seems to work as I get a
>>> CR_SUCCESS (I get a number around 8500. But as I'm not sure what is in
>>> the list I do not know if this is a valid number)
>>>
>>> The problem arisis when I want to retrive the list itself..
>>>
>>> MSDN:
>>> CM_Get_Device_ID_List(
>>>    IN PCTSTR  pszFilter,  OPTIONAL
>>>    OUT PTCHAR  Buffer,
>>>    IN ULONG  BufferLen,
>>>    IN ULONG  ulFlags
>>>    );
>>>
>>> I can't get this to work, neighter the declaration or the call of the
>>> function :( I have tried everything I know (and could find on the net)
>>> but it all crashses or give no information.
>>> To the best of my knowledge there are no thing like pointers in vb and
>>> as I read this, it gives you a pointer..?!?
>>>
>>> Anyone out there thet can show how to retrive the list or an example
>>> that explains the workings of functions like this?
>>>
>>> Hope someone out there can help.
>>>
>>> Thanks
>>>  Henning
>>>
>>>
>>> ------------------------------------------------------------FULL MSDN
>>> INFORMATION----------------------------------------------------------------------
>>> -------http://msdn.microsoft.com/library/default.asp?url=/library/en-us/DevInst_r/hh/DevInst_r/cfgmgrfn_e9f614d2-9bac-4b30-b9a0-f0764e37950b.xml.asp------
>>> --------------------------------------------------------------------------------------------------------------------------------------------------------------------
>>>
>>> CM_Get_Device_ID_List
>>> The CM_Get_Device_ID_List function retrieves a list of device instance
>>> IDs for the local machine's device instances.
>>>
>>> CMAPI CONFIGRET WINAPI
>>>  CM_Get_Device_ID_List(
>>>    IN PCTSTR  pszFilter,  OPTIONAL
>>>    OUT PTCHAR  Buffer,
>>>    IN ULONG  BufferLen,
>>>    IN ULONG  ulFlags
>>>    );
>>>
>>> Parameters
>>> pszFilter
>>> Caller-supplied pointer to a character string specifying a subset of the
>>> machine's device instance identifiers, or NULL. See the following
>>> description of ulFlags.
>>> Buffer
>>> Address of a buffer to receive a set of NULL-terminated device instance
>>> identifier strings. The end of the set is terminated by an extra NULL.
>>> The required buffer size should be obtained by calling
>>> CM_Get_Device_ID_List_Size.
>>> BufferLen
>>> Caller-supplied length, in characters, of the buffer specified by
>>> Buffer.
>>> ulFlags
>>> One of the optional, caller-supplied bit flags, listed in the following
>>> table, which specify search filters. If no flags are specified, the
>>> function returns all device instance IDs for all device instances.
>>> CM_GETIDLIST_FILTER_ENUMERATOR
>>>
>>> If this flag is set, pszFilter must specify the name of a device
>>> enumerator, optionally followed by a device identifier. The string
>>> format is EnumeratorName\<DeviceID>, such as ROOT or ROOT\*PNP0500.
>>> If pszFilter supplies only an enumerator name, the function returns
>>> device instance IDs for the instances of each device associated with the
>>> enumerator. Enumerator names can be obtained by calling
>>> CM_Enumerate_Enumerators.
>>>
>>> If pszFilter supplies both an enumerator and a device ID, the function
>>> returns device instance IDs only for the device instances of the
>>> specified device, associated with the enumerator.
>>>
>>> CM_GETIDLIST_FILTER_SERVICE
>>>
>>> If this flag is set, pszFilter must specify the name of a Windows
>>> service (typically a driver). The function returns device instance IDs
>>> for the device instances controlled by the specified service.
>>> Note that if the device tree does not contain a device node for the
>>> specified service, this function creates one by default. To inhibit this
>>> behavior, also set CM_GETIDLIST_DONOTGENERATE.
>>>
>>> CM_GETIDLIST_FILTER_EJECTRELATIONS
>>>
>>> If this flag is set, pszFilter must specify a device name. The function
>>> returns device instance IDs for the ejection relations of the specified
>>> device instance.
>>> CM_GETIDLIST_FILTER_REMOVALRELATIONS
>>>
>>> If this flag is set, pszFilter must specify a device name. The function
>>> returns device instance IDs for the removal relations of the specified
>>> device instance.
>>> CM_GETIDLIST_FILTER_POWERRELATIONS
>>>
>>> Not used.
>>> CM_GETIDLIST_FILTER_BUSRELATIONS
>>>
>>> Not used.
>>> CM_GETIDLIST_DONOTGENERATE
>>>
>>> Used only with CM_GETIDLIST_FILTER_SERVICE. If set, and if the device
>>> tree does not contain a device node for the specified service, this flag
>>> prevents the function from creating a device node for the service.
>>>
>>>
>>> Return Value
>>> If the operation succeeds, the function returns CR_SUCCESS. Otherwise,
>>> it returns one of the CR_-prefixed error codes defined in cfgmgr32.h.
>>>
>>> Headers
>>> Declared in cfgmgr32.h. Include cfgmgr32.h.
>>>
>>> Comments
>>> For information about device instance IDs, see Device Identification
>>> Strings.
>>>
>>>
>>
>>
>
>

"Claes Bergefall" <louplou@nospam.nospam> wrote in message
news:OipVgjLXGHA.4620@TK2MSFTNGP04.phx.gbl...
> The StringBuilder should handle embedded nulls just fine, but the debugger
> might not show the correct result.
> How are you checking the returned value?
>
>   /claes
>
> "Henning M" <henn***@fys.ku.dk> wrote in message
> news:cd1f1$4436900e$3e3d8433$2140@news.arrownet.dk...
>> Thanks a lot, this works if I only need the first item in the list.
>> The stringbuilder only reads till the first NULL value.
>>
>> Is it possible to configure the StringBuilder to use a double NULL value
>> as string termination.
>> I found nothing of the kind in the list of StringBuilder Members :(
>>
>> Are there any other way of manually cyclinging trough the list?
>>
>> /Henning
>>
>> "Claes Bergefall" <louplou@nospam.nospam> wrote in message
>> news:%23gAsbIlWGHA.2080@TK2MSFTNGP05.phx.gbl...
>>> The recommended way to pass string buffers when using P/Invoke is to use
>>> a StringBuilder object
>>> Something like this should work (watch out for line breaks)
>>>
>>> Declare Auto Function CM_Get_Device_ID_List_Size Lib "cfgmgr32.dll"
>>> Alias (ByRef pulLen As Integer, ByVal pszFilter As String, ByVal ulFlags
>>> As Integer) As Integer
>>>
>>> Declare Auto Function CM_Get_Device_ID_List Lib "cfgmgr32.dll" (ByVal
>>> pszFilter As String, ByVal ptChar As System.Text.StringBuilder, ByVal
>>> bufferLen As Integer, ByVal ulFlags As Integer) As Integer
>>>
>>> Dim filter As String  ' TODO: Initialize
>>> Dim flags As Integer  ' TODO: Initialize
>>> Dim len As Integer
>>> CM_Get_Device_ID_List_Size(len, filter, flags)
>>>
>>> Dim sb As New StringBuilder(len + 1)
>>> CM_Get_Device_ID_List(filter, sb, sb.Capacity, flags)
>>>
>>>
>>>   /claes
>>>
>>>
>>>
>>> "Henning M" <henn***@fys.ku.dk> wrote in message
>>> news:38bf7$44366247$3e3d8433$21013@news.arrownet.dk...
>>>> Hej All
>>>>
>>>> Im relativ new to VB.net and im trying to collect som device
>>>> information using cfgmgr32.dll
>>>>
>>>> I use  - Declare Function GetListLength Lib "cfgmgr32.dll" Alias
>>>> "CM_Get_Device_ID_List_SizeA" (ByRef pulLen As Integer, ByVal pszFilter
>>>> As Integer, ByVal UlFlags As Integer) As Integer -
>>>> To get the length of the device list. This seems to work as I get a
>>>> CR_SUCCESS (I get a number around 8500. But as I'm not sure what is in
>>>> the list I do not know if this is a valid number)
>>>>
>>>> The problem arisis when I want to retrive the list itself..
>>>>
>>>> MSDN:
>>>> CM_Get_Device_ID_List(
>>>>    IN PCTSTR  pszFilter,  OPTIONAL
>>>>    OUT PTCHAR  Buffer,
>>>>    IN ULONG  BufferLen,
>>>>    IN ULONG  ulFlags
>>>>    );
>>>>
>>>> I can't get this to work, neighter the declaration or the call of the
>>>> function :( I have tried everything I know (and could find on the net)
>>>> but it all crashses or give no information.
>>>> To the best of my knowledge there are no thing like pointers in vb and
>>>> as I read this, it gives you a pointer..?!?
>>>>
>>>> Anyone out there thet can show how to retrive the list or an example
>>>> that explains the workings of functions like this?
>>>>
>>>> Hope someone out there can help.
>>>>
>>>> Thanks
>>>>  Henning
>>>>
>>>>
>>>> ------------------------------------------------------------FULL MSDN
>>>> INFORMATION----------------------------------------------------------------------
>>>> -------http://msdn.microsoft.com/library/default.asp?url=/library/en-us/DevInst_r/hh/DevInst_r/cfgmgrfn_e9f614d2-9bac-4b30-b9a0-f0764e37950b.xml.asp------
>>>> --------------------------------------------------------------------------------------------------------------------------------------------------------------------
>>>>
>>>> CM_Get_Device_ID_List
>>>> The CM_Get_Device_ID_List function retrieves a list of device instance
>>>> IDs for the local machine's device instances.
>>>>
>>>> CMAPI CONFIGRET WINAPI
>>>>  CM_Get_Device_ID_List(
>>>>    IN PCTSTR  pszFilter,  OPTIONAL
>>>>    OUT PTCHAR  Buffer,
>>>>    IN ULONG  BufferLen,
>>>>    IN ULONG  ulFlags
>>>>    );
>>>>
>>>> Parameters
>>>> pszFilter
>>>> Caller-supplied pointer to a character string specifying a subset of
>>>> the machine's device instance identifiers, or NULL. See the following
>>>> description of ulFlags.
>>>> Buffer
>>>> Address of a buffer to receive a set of NULL-terminated device instance
>>>> identifier strings. The end of the set is terminated by an extra NULL.
>>>> The required buffer size should be obtained by calling
>>>> CM_Get_Device_ID_List_Size.
>>>> BufferLen
>>>> Caller-supplied length, in characters, of the buffer specified by
>>>> Buffer.
>>>> ulFlags
>>>> One of the optional, caller-supplied bit flags, listed in the following
>>>> table, which specify search filters. If no flags are specified, the
>>>> function returns all device instance IDs for all device instances.
>>>> CM_GETIDLIST_FILTER_ENUMERATOR
>>>>
>>>> If this flag is set, pszFilter must specify the name of a device
>>>> enumerator, optionally followed by a device identifier. The string
>>>> format is EnumeratorName\<DeviceID>, such as ROOT or ROOT\*PNP0500.
>>>> If pszFilter supplies only an enumerator name, the function returns
>>>> device instance IDs for the instances of each device associated with
>>>> the enumerator. Enumerator names can be obtained by calling
>>>> CM_Enumerate_Enumerators.
>>>>
>>>> If pszFilter supplies both an enumerator and a device ID, the function
>>>> returns device instance IDs only for the device instances of the
>>>> specified device, associated with the enumerator.
>>>>
>>>> CM_GETIDLIST_FILTER_SERVICE
>>>>
>>>> If this flag is set, pszFilter must specify the name of a Windows
>>>> service (typically a driver). The function returns device instance IDs
>>>> for the device instances controlled by the specified service.
>>>> Note that if the device tree does not contain a device node for the
>>>> specified service, this function creates one by default. To inhibit
>>>> this behavior, also set CM_GETIDLIST_DONOTGENERATE.
>>>>
>>>> CM_GETIDLIST_FILTER_EJECTRELATIONS
>>>>
>>>> If this flag is set, pszFilter must specify a device name. The function
>>>> returns device instance IDs for the ejection relations of the specified
>>>> device instance.
>>>> CM_GETIDLIST_FILTER_REMOVALRELATIONS
>>>>
>>>> If this flag is set, pszFilter must specify a device name. The function
>>>> returns device instance IDs for the removal relations of the specified
>>>> device instance.
>>>> CM_GETIDLIST_FILTER_POWERRELATIONS
>>>>
>>>> Not used.
>>>> CM_GETIDLIST_FILTER_BUSRELATIONS
>>>>
>>>> Not used.
>>>> CM_GETIDLIST_DONOTGENERATE
>>>>
>>>> Used only with CM_GETIDLIST_FILTER_SERVICE. If set, and if the device
>>>> tree does not contain a device node for the specified service, this
>>>> flag prevents the function from creating a device node for the service.
>>>>
>>>>
>>>> Return Value
>>>> If the operation succeeds, the function returns CR_SUCCESS. Otherwise,
>>>> it returns one of the CR_-prefixed error codes defined in cfgmgr32.h.
>>>>
>>>> Headers
>>>> Declared in cfgmgr32.h. Include cfgmgr32.h.
>>>>
>>>> Comments
>>>> For information about device instance IDs, see Device Identification
>>>> Strings.
>>>>
>>>>
>>>
>>>
>>
>>
>
>