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public static extern bool FtpCommandA

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IntPtr phFtpCommand);

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Declare Function FtpCommandA Lib "wininet.dll" _

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ByVal phFtpCommand As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean

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phFtpCommand (out) A pointer to a handle that is created if a valid data socket is opened. The fExpectResponse parameter must be set to TRUE for phFtpCommand to be filled.

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Dim ret As Boolean = FTPCommandA(ConnectionHandle, False, 0, sCommand, IntPtr.Zero, IntPtr.Zero)

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Documentation

[FtpCommand] on MSDN http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wininet/wininet/ftpcommand.asp

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static extern bool FtpCommand(IntPtr hConnect, bool fExpectResponse, [MarshalAs(UnmanagedType.U4)] int dwFlags, string lpszCommand, IntPtr dwContext, ref IntPtr phFtpCommand);

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Private Shared Function FtpCommand(ByVal hConnect As IntPtr, ByVal fExpectResponse As Boolean, <MarshalAs(UnmanagedType.U4)> ByVal dwFlags As Integer, ByVal lpszCommand As String, ByVal dwContext As IntPtr, ByRef phFtpCommand As IntPtr) As Boolean

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Documentation

[FtpCommand] on MSDN