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The CryptGetUserKey function retrieves a handle to a permanent user key pair, such as the user’s signature key pair.

Declare Function CryptGetUserKey Lib "advapi32.dll" (ByVal hProv As Long, ByVal dwKeySpec As Long, phUserKey As Long) As Long


Operating Systems Supported
Windows NT 4.0 or later; Windows 95 OSR2 or later (or Windows 95 with Internet Explorer 3.02 or later)


Parameter Information
· hProv
[in] A handle to the application’s CSP. An application obtains this handle using the CryptAcquireContext function.

· dwKeySpec
[in] The specification of the key to retrieve. The following keys are retrievable from almost all providers:
· AT_KEYEXCHANGE ¾ Exchange public key
· AT_SIGNATURE ¾ Signature public key
Additionally, some providers allow access to other user specific keys through this function. See the documentation on the specific provider for details.

· phUserKey
[out] The address that the function copies the handle of the retrieved key to.

Return Values
If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To retrieve extended error information, use the GetLastError function.

The following table lists the error codes most commonly returned by the GetLastError function. The error codes prefaced by “NTE” are generated by the particular CSP you are using.
One of the parameters specifies an invalid handle.

One of the parameters contains an invalid value. This is most often an illegal pointer.

The dwKeySpec parameter contains an invalid value.

The hProv parameter does not contain a valid context handle.

The key requested by the dwKeySpec parameter does not exist.


Related Functions

No VB.NET Example Found



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