Menggunakan Toko di Lokasi Yang Berbeda

[CAPICOM adalah komponen 32-bit saja yang tersedia untuk digunakan dalam sistem operasi berikut: Windows Server 2008, Windows Vista, dan Windows XP. Sebagai gantinya, gunakan .NET Framework untuk menerapkan fitur keamanan. Untuk informasi selengkapnya, lihat Alternatif untuk Menggunakan CAPICOM.]

Contoh berikut menunjukkan aspek bekerja dengan objek Store . Ini menunjukkan pembukaan toko di lokasi CAPICOM_MEMORY_STORE, CAPICOM_CURRENT_USER_STORE, dan CAPICOM_LOCAL_MACHINE_STORE.

Contoh menunjukkan mengekspor sertifikat dari penyimpanan terbuka, menulis sertifikat yang diekspor ke file, membacanya kembali dan mengimpornya ke penyimpanan yang berbeda. Sertifikat yang baru diimpor kemudian dijumlahkan dan ditampilkan.

Pada kesalahan CAPICOM apa pun, nilai desimal negatif Err.Number dikembalikan. Untuk informasi selengkapnya, lihat CAPICOM_ERROR_CODE. Untuk informasi tentang nilai desimal positif Err.Number, lihat Winerror.h.

Sub OpenStores()

    On Error GoTo ErrorHandler

    'Open Memory, current user, and local machine stores
    Dim MemoryStore As New Store
    Dim CurrentUserStore As New Store
    Dim LocalMachineStore As New Store
    Dim NumCerts As Integer

    MemoryStore.Open(CAPICOM_MEMORY_STORE, "MemStore", _
        CAPICOM_STORE_OPEN_READ_WRITE)
    CurrentUserStore.Open(CAPICOM_CURRENT_USER_STORE, _
        CAPICOM_MY_STORE, CAPICOM_STORE_OPEN_READ_ONLY)
    LocalMachineStore.Open(CAPICOM_LOCAL_MACHINE_STORE, _
        CAPICOM_CA_STORE, CAPICOM_STORE_OPEN_READ_ONLY)

    ' Check the number of certificates in the stores.
    NumCerts = MemoryStore.Certificates.Count
    MsgBox("There are " & NumCerts & _
        " certificates in the memory store. ")
    NumCerts = CurrentUserStore.Certificates.Count
    MsgBox("There are " & NumCerts & _
        " certificates in the current user store. ")
    NumCerts = LocalMachineStore.Certificates.Count
    MsgBox("There are " & NumCerts & _
        " certificates in the local machine store. ")


    '  Export the certificates in the current user MY store
    '  to a file.
    Dim ExportString As String
    ExportString = CurrentUserStore.Export
Open "Exportcerts.txt" For Output As #1
Write #1, ExportString
Close #1

    ' Read the store the file.
    Dim importString As String
Open "exportcerts.txt" For Input As #2
Input #2, importString
Close #2
    MemoryStore.Import(importString)

    ' Check the number of certificates in the memory store after 
    ' import()
    NumCerts = MemoryStore.Certificates.Count
    MsgBox("There are " & NumCerts & _
        " certificates now in the memory store. ")

    ' Enumerate the certificates in the memory store and display each
    ' certificate
    Dim i As Long
    For i = 1 To NumCerts
        MemoryStore.Certificates.Item(i).Display()
    Next i

    ' Release the store objects
    MemoryStore = Nothing
    CurrentUserStore = Nothing
    LocalMachineStore = Nothing
    Exit Sub
ErrorHandler:
    If Err.Number > 0 Then
        MsgBox("Visual Basic error found: " & Err.Description)
    Else
        MsgBox("CAPICOM error found : " & Err.Number)
    End If
End Sub