Computer Make and Model identifier

[Shooter]

Is there an API that is simple to use to identify the computer's make and model, or perhaps a place in the system registry (consistent for all Windows versions)?

Thanks,
-Shooter

[donkey]

That's done using WMI's Win32_ComputerSystem Class and though it is straight forward, it is not "simple" to use.

[Shooter]

That's done using WMI's Win32_ComputerSystem Class and though it is straight forward, it is not "simple" to use.

Yeah, I saw that earlier and was blown away. It certainly don't look 'simple'.  :'(

[donkey]

You can query the registry or  look for an oeminfo.ini file, but they can be altered so they're unreliable or you can go the complicated route of writing a driver to query the SMBIOS directly. Its those or WMI.

[Shooter]

You can query the registry or  look for an oeminfo.ini file, but they can be altered so they're unreliable or you can go the complicated route of writing a driver to query the SMBIOS directly. Its those or WMI.

Since my program is dependent on the model I guess I'm gonna have to go the long route.  I've never dealt directly with a class like that before, so I guess I might be callin' on some help in the future on this one, particularly in converting it to MASM code. :(

[Magnum]

For HP Computers, there are a number of registry entries that contain the make and model.

[Shooter]

For HP Computers, there are a number of registry entries that contain the make and model.

The same holds true for SOME Dell models, but not all.

[donkey]

Seriously, don't dick around with the registry, it can be changed by any user who can type RegEdit and use the FIND function. If you want to do a professional application then use the right interfaces and in this case that means using WMI to read the SMBIOS. Here's a quick demo of getting the manufacturer, you can always add anything else you want from the Win32_ComputerSystem Class object. Note that this is COM so be sure to call CoInitialize.

Code Select Expand

// Headers available at
// http://www.quickersoft.com/donkey/index.html

// NOTE: INCLUDE Environment variable must be set to headers path

#DEFINE WINVER NTDDI_WIN7
#DEFINE FILTERAPI
#DEFINE LINKFILES

#include "WINDOWS.H"
#include "macros.h"
#include "wbemcli.h"

DATA SECTION
// Classes
CLSID_WbemLocator GUID GUID_CLSID_WbemLocator

// Interfaces
IID_IUnknown GUID GUID_IID_IUnknown
IID_IWbemLocator GUID GUID_IID_IWbemLocator
IID_IWbemServices GUID GUID_IID_IWbemServices

// Pointers >> in X64 builds do not store any pointers in LOCAL data !
pNameSpace PTR ?
pWbemLocator PTR ?
pUnk PTR ?
pObj PTR ?
pEnum PTR ?

// Results
szManufacturer CHAR 256 DUP (?)
szModel CHAR 256 DUP (?)

CODE SECTION

invoke CoInitialize,NULL

invoke GetManufacturer,offset szManufacturer,offset szModel

invoke MessageBox,NULL,offset szModel,offset szManufacturer,NULL

invoke CoUninitialize

invoke ExitProcess,0

GetManufacturer FRAME pManufacturer, pModel
LOCAL hres :%HANDLE
LOCAL bstrNameSpace :%PTR
LOCAL variant :%PTR

// Connect to the desired namespace
invoke SysAllocString,L"\\.\root\cimv2"
mov [bstrNameSpace], eax

invoke CoInitializeSecurity, 0,-1,0,0,RPC_C_AUTHN_LEVEL_DEFAULT,RPC_C_IMP_LEVEL_IMPERSONATE,0,EOAC_NONE,0
mov [hres],eax

invoke CoCreateInstance,offset CLSID_WbemLocator,NULL,CLSCTX_INPROC_SERVER,offset IID_IWbemLocator, offset pWbemLocator
test eax,eax
jnz >>.EXIT

CoInvoke(pWbemLocator,IWbemLocator.ConnectServer,[bstrNameSpace],0,0,0,0,0,0,offset pNameSpace)
test eax,eax
jnz >>.EXIT1
CoInvoke(pNameSpace,IWbemServices.IUnknown.QueryInterface,offset IID_IUnknown,offset pUnk)
test eax,eax

// Set the security for our proxy
invoke CoSetProxyBlanket,[pNameSpace],RPC_C_AUTHN_WINNT,RPC_C_AUTHZ_NONE,0,RPC_C_AUTHN_LEVEL_DEFAULT,RPC_C_IMP_LEVEL_IMPERSONATE,0,EOAC_NONE
invoke CoSetProxyBlanket,[pUnk],RPC_C_AUTHN_WINNT,RPC_C_AUTHZ_NONE,0,RPC_C_AUTHN_LEVEL_DEFAULT,RPC_C_IMP_LEVEL_IMPERSONATE,0,EOAC_NONE
CoInvoke(pUnk,Unknown.Release)

// Execute the query, just pull all of the information
CoInvoke(pNameSpace,IWbemServices.ExecQuery, L"WQL", L'Select * from Win32_ComputerSystem',WBEM_FLAG_RETURN_IMMEDIATELY,NULL,offset pEnum)
test eax,eax
jnz >>.EXIT2

// Step the enumeration through the class object
CoInvoke(pEnum,IEnumWbemClassObject.Next,WBEM_INFINITE,1,offset pObj,offset hres)
test eax,eax
jnz >.EXIT3

// Get the information we want
CoInvoke(pObj,IWbemClassObject.Get,L"Manufacturer",0,offset variant,0,0)
test eax,eax
jnz >.EXIT4
// The information is in UNICODE so convert it
invoke WideCharToMultiByte,CP_ACP,NULL,[variant+8],-1,[pManufacturer],256,NULL,NULL
invoke VariantClear,offset variant

CoInvoke(pObj,IWbemClassObject.Get,L"Model",0,offset variant,0,0)
test eax,eax
jnz >.EXIT4
// The information is in UNICODE so convert it
invoke WideCharToMultiByte,CP_ACP,NULL,[variant+8],-1,[pModel],256,NULL,NULL
invoke VariantClear,offset variant

.EXIT4
CoInvoke(pObj,IWbemClassObject.Release)
.EXIT3
CoInvoke(pEnum,IEnumWbemClassObject.Release)
.EXIT2
CoInvoke(pNameSpace,IWbemServices.Release)
.EXIT1
CoInvoke(pWbemLocator,IWbemLocator.Release)
.EXIT
invoke SysFreeString,[bstrNameSpace]
ret
endf

PS don't even bother to ask me to translate this, I program in GoAsm and on occasion I will translate things to MASM but this is too much work since MASM does not have intrinsic inline strings or UNICODE support.

edit: added VariantClear to free up resources.

[donkey]

Forgot to attach the project, here it is with source and executable:

[hutch--]

Edgar,

It identifies my Intel board fine.

[donkey]

Thanks Steve,

I neglected to call VariantClear after each of the WideCharToMultiByte calls:

Code Select Expand

invoke WideCharToMultiByte,CP_ACP,NULL,[variant+8],-1,[pModel],256,NULL,NULL
invoke VariantClear,offset variant

It should be called to free the variants resources.

[Shooter]

Edgar,
It identified my Dell Latitude D600 just fine. I'll try it at work to see how it does there too.

Thanks a ton. Now I just gotta integrate it into my project somehow. I'm not at all familiar with the Windows COM objects, and going from GoASM to MASM might be a bit of a challenge for this newby, but I think I can work with this code you provided. Handy little code too.

-Shooter

[sinsi]

Mine says "To Be Filled By O.E.M."  :lol

To be fair, I think the BIOS setup tells me the same.

[dedndave]

mine reports "VGC-RB42G" which is correct however, you'd have to know that was a Sony model number

[donkey]

mine reports "VGC-RB42G" which is correct however, you'd have to know that was a Sony model number

Hi Dave,

No "Sony" as the MessageBox title ? I would have thought they would have adhered to the specs.