要解决这个问题，您可以尝试以下代码示例：

#include 
#include 
#include 

int main() {
    CredHandle credHandle;
    TimeStamp ts;
    SEC_WINNT_AUTH_IDENTITY authIdentity;
    SEC_WINNT_AUTH_IDENTITY *pAuthIdentity = nullptr;
    LPCTSTR pszPfxFilePath = "path_to_pfx_file";
    LPCTSTR pszPfxPassword = "pfx_password";

    // Set the authentication identity if PFX password is provided
    if (pszPfxPassword != nullptr) {
        authIdentity.Domain = nullptr;
        authIdentity.DomainLength = 0;
        authIdentity.User = nullptr;
        authIdentity.UserLength = 0;
        authIdentity.Password = (unsigned char*)pszPfxPassword;
        authIdentity.PasswordLength = lstrlenA(pszPfxPassword);
        authIdentity.Flags = SEC_WINNT_AUTH_IDENTITY_UNICODE;
        pAuthIdentity = &authIdentity;
    }

    // Acquire credentials handle
    SECURITY_STATUS status = AcquireCredentialsHandleA(
        nullptr,                   // principal name
        "Microsoft Unified Security Protocol Provider", // security package name
        SECPKG_CRED_OUTBOUND,      // credential use
        nullptr,                   // logon ID
        pAuthIdentity,             // AuthData
        nullptr,                   // get key function
        nullptr,                   // get key argument
        &credHandle,               // credential handle
        &ts                        // credential expiration
    );

    if (status != SEC_E_OK) {
        std::cout << "Error acquiring credentials handle: 0x" << std::hex << status << std::endl;
        return status;
    }

    // Use the acquired credentials handle for further operations

    // Free the credentials handle
    FreeCredentialsHandle(&credHandle);

    return 0;
}

请将 path_to_pfx_file 替换为实际的 PFX 文件路径，将 pfx_password 替换为实际的 PFX 密码。

如果 AcquireCredentialsHandleA() 返回 0x8009030e，表示在安全包中没有可用的凭据。这可能是由于以下原因导致的：

1. PFX 文件路径不正确，或者文件不可访问。
2. PFX 密码不正确。
3. 安全包不支持指定的凭据类型。

您可以根据具体情况调查并解决这些问题。