C# Signature:

[DllImport("wininet.dll", SetLastError=true)]
static extern bool InternetCrackUrl(TODO);

VB Signature:

Declare Function InternetCrackUrl Lib "wininet.dll" (ByVal lpszUrl As String, ByRef dwUrlLength As Integer, ByRef dwFlags As Integer, ByRef lpUrlComponents As URL_COMPONENTS) As <MarshalAs(UnmanagedType.Bool)> Boolean

User-Defined Types:

Private Structure URL_COMPONENTS

    Public dwStructSize As Integer
    Public lpszScheme As String
    Public dwSchemeLength As Integer
    Public nScheme As INTERNET_SCHEME
    Public lpszHostName As String
    Public dwHostNameLength As Integer
    Public nPort As Integer
    Public lpszUserName As String
    Public dwUserNameLength As Integer
    Public lpszPassword As String
    Public dwPasswordLength As Integer
    Public lpszUrlPath As String
    Public dwUrlPathLength As Integer
    Public lpszExtraInfo As String
    Public dwExtraInfoLength As Integer

End Structure

Public Enum INTERNET_SCHEME

    INTERNET_SCHEME_PARTIAL = -2
    INTERNET_SCHEME_UNKNOWN = -1
    INTERNET_SCHEME_DEFAULT = 0
    INTERNET_SCHEME_FTP
    INTERNET_SCHEME_GOPHER
    INTERNET_SCHEME_HTTP
    INTERNET_SCHEME_HTTPS
    INTERNET_SCHEME_FILE
    INTERNET_SCHEME_NEWS
    INTERNET_SCHEME_MAILTO
    INTERNET_SCHEME_FIRST = INTERNET_SCHEME_FTP
    INTERNET_SCHEME_LAST = INTERNET_SCHEME_MAILTO

End Enum

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