@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: This function is a simplified function used to open the most common system certificate store. To open certificate stores with more complex requirements, such as file-based or memory-based stores, use the CertOpenStore function. !!!!C# Signature: [DllImport("crypt32.dll", CharSet=CharSet.Auto, SetLastError=true)] static extern IntPtr CertOpenSystemStore(IntPtr hCryptProv, string storename); !!!!VB .NET Signature: <DllImport("Crypt32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _ Private Shared Function CertOpenSystemStore( _ ByVal hCryptProv As IntPtr, _ ByVal storename As String) As IntPtr End Function !!!!User-Defined Types: None. !!!!Notes: Try MSDN: http://msdn.microsoft.com/en-us/library/ms867087.aspx The sample code below seems to be taken from this. !!!!Tips & Tricks: Please add some! !!!!Sample Code: using System; using System.Runtime.InteropServices; using System.Security.Cryptography.X509Certificates; using System.ComponentModel; public class WinCapi { /* HCERTSTORE WINAPI CertOpenSystemStore(HCRYPTPROV hprov, LPTCSTR szSubsystemProtocol); BOOL WINAPI CertCloseStore(HCERTSTORE hCertStore, DWORD dwFlags); PCCERT_CONTEXT WINAPI CertFindCertificateInStore( HCERTSTORE hCertStore, DWORD dwCertEncodingType, DWORD dwFindFlags, DWORD dwFindType, const void* pvFindPara, PCCERT_CONTEXT pPrevCertContext); BOOL WINAPI CertFreeCertificateContext( PCCERT_CONTEXT pCertContext ); */ [DllImport("crypt32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern IntPtr CertOpenSystemStore( IntPtr hCryptProv, string storename); [DllImport("crypt32.dll", SetLastError = true)] public static extern bool CertCloseStore( IntPtr hCertStore, uint dwFlags); [DllImport("crypt32.dll", SetLastError = true)] public static extern IntPtr CertFindCertificateInStore( IntPtr hCertStore, uint dwCertEncodingType, uint dwFindFlags, uint dwFindType, [In, MarshalAs(UnmanagedType.LPWStr)]String pszFindString, IntPtr pPrevCertCntxt); [DllImport("crypt32.dll", SetLastError = true)] public static extern bool CertFreeCertificateContext( IntPtr hCertStore); } public class SimpleCert { const string MY = "MY"; const string OTHERS = "AddressBook"; const uint PKCS_7_ASN_ENCODING = 0x00010000; const uint X509_ASN_ENCODING = 0x00000001; const uint CERT_FIND_SUBJECT_STR = 0x00080007; static uint MY_ENCODING_TYPE = PKCS_7_ASN_ENCODING | X509_ASN_ENCODING; static string lpszCertSubject = "searched name"; public static void Main() { IntPtr hSysStore = IntPtr.Zero; IntPtr hCertCntxt = IntPtr.Zero; hSysStore = WinCapi.CertOpenSystemStore(IntPtr.Zero, MY); Console.WriteLine("Store Handle:\t0x{0:X}", hSysStore.ToInt32()); if (hSysStore != IntPtr.Zero) { hCertCntxt = WinCapi.CertFindCertificateInStore( hSysStore, MY_ENCODING_TYPE, 0, CERT_FIND_SUBJECT_STR, lpszCertSubject, IntPtr.Zero); if (hCertCntxt != IntPtr.Zero) { //use certcontext from managed code Console.WriteLine("CertContext:\t0x{0:X}", hCertCntxt.ToInt32()); X509Certificate foundcert = new X509Certificate(hCertCntxt); Console.WriteLine("\nFound certificate with SubjectName string \"{0}\"", lpszCertSubject); Console.WriteLine("SubjectName:\t{0}", foundcert.GetName()); Console.WriteLine("Serial No:\t{0}", foundcert.GetSerialNumberString()); Console.WriteLine("HashString:\t{0}", foundcert.GetCertHashString()); } else Console.WriteLine("Could not find SubjectName containing string \"{0}\"", lpszCertSubject); } //------- Clean Up ----------- if (hCertCntxt != IntPtr.Zero) WinCapi.CertFreeCertificateContext(hCertCntxt); if (hSysStore != IntPtr.Zero) WinCapi.CertCloseStore(hSysStore, 0); } } !!!!Alternative Managed API: TODO Documentation: CertOpenSystemStore@msdn on MSDN
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