ConnectServerWmi function

Artikkeli
09/15/2021

Creates a connection through DCOM to a WMI namespace on a specified computer.

Note

This API is for internal use only. It's not intended for use from developer code.

Syntax

HRESULT ConnectServerWmi (
   [in] BSTR               strNetworkResource,
   [in] BSTR               strUser,
   [in] BSTR               strPassword,
   [in] BSTR               strLocale,
   [in] long               lSecurityFlags,
   [in] BSTR               strAuthority,
   [in] IWbemContext*      pCtx,
   [out] IWbemServices**   ppNamespace,
   [in] DWORD              impLevel,
   [in] DWORD              authLevel
);

Parameters

strNetworkResource
[in] Pointer to a valid BSTR that contains the object path of the correct WMI namespace. See the Remarks section for more information.

strUser
[in] A pointer to a valid BSTR that contains the user name. A null value indicates the current security context. If the user is from a different domain than the current one, strUser can also contain the domain and user name separated by a backslash. strUser can also be in user principal name (UPN) format, such as userName@domainName. See the Remarks section for more information.

strPassword
[in] A pointer to a valid BSTR that contains the password. A null indicates the current security context. An empty string ("") indicates a valid zero-length password.

strLocale
[in] A pointer to a valid BSTR that indicates the correct locale for information retrieval. For Microsoft locale identifiers, the format of the string is "MS_xxx", where xxx is a string in hexadecimal form that indicates the locale identifier (LCID). If an invalid locale is specified, the method returns WBEM_E_INVALID_PARAMETER except on Windows 7, where the default locale of the server is used instead. If `null1, the current locale is used.

lSecurityFlags
[in] Flags to pass to the ConnectServerWmi method. A value of zero (0) for this parameter results in the call to ConnectServerWmi returning only after a connection to the server is established. This could result in an application not responding indefinitely if the server is broken. The other valid values are:

Constant	Value	Description
`CONNECT_REPOSITORY_ONLY`	0x40	Reserved for internal use. Do not use.
`WBEM_FLAG_CONNECT_USE_MAX_WAIT`	0x80	`ConnectServerWmi` returns in two minutes or less.

strAuthority
[in] The domain name of the user. It can have the following values:

Value	Description
blank	NTLM authentication is used, and the NTLM domain of the current user is used. If `strUser` specifies the domain (the recommended location), it must not be specified here. The function returns `WBEM_E_INVALID_PARAMETER` if you specify the domain in both parameters.
Kerberos:principal name	Kerberos authentication is used, and this parameter contains a Kerberos principal name.
NTLMDOMAIN:domain name	NT LAN Manager authentication is used, and this parameter contains an NTLM domain name.

pCtx
[in] Typically, this parameter is null. Otherwise, it is a pointer to an IWbemContext object required by one or more dynamic class providers.

ppNamespace
[out] When the function returns, receives a pointer to an IWbemServices object bound to the specified namespace. It is set to point to null when there is an error.

impLevel
[in] The impersonation level.

authLevel
[in] The authorization level.

Return value

The following values returned by this function are defined in the WbemCli.h header file, or you can define them as constants in your code:

Constant	Value	Description
`WBEM_E_FAILED`	0x80041001	There has been a general failure.
`WBEM_E_INVALID_PARAMETER`	0x80041008	A parameter is not valid.
`WBEM_E_OUT_OF_MEMORY`	0x80041006	Not enough memory is available to complete the operation.
`WBEM_S_NO_ERROR`	0	The function call was successful.

Remarks

This function wraps a call to the IWbemLocator::ConnectServer method.

For local access to the default namespace, strNetworkResource can be a simple object path: "root\default" or "\.\root\default". For access to the default namespace on a remote computer using COM or Microsoft-compatible networking, include the computer name: "\myserver\root\default". The computer name also can be a DNS name or IP address. The ConnectServerWmi function can also connect with computers running IPv6 using an IPv6 address.

strUser cannot be an empty string. If the domain is specified in strAuthority, it must not also be included in strUser, or the function returns WBEM_E_INVALID_PARAMETER.

Requirements

Platforms: See System Requirements.

Header: WMINet_Utils.idl

.NET Framework Versions: Available since 4.7.2

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