C# Signature:

// For 32-bit execution
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct WSAData
[StructLayout(LayoutKind.Sequential)]
public class WSAData
{
    public Int16 version;
    public Int16 highVersion;

    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 257)]
    public String description;

    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 129)]
    public String systemStatus;

    public Int16 maxSockets;
    public Int16 maxUdpDg;
    public IntPtr vendorInfo;
}

// For 64-bit execution
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
internal struct WSAData64
{
    internal ushort wVersion;
    internal ushort wHighVersion;
    internal ushort iMaxSockets;
    internal ushort iMaxUdpDg;
    internal IntPtr lpVendorInfo;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 257)]
    internal string szDescription;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 129)]
    internal string szSystemStatus;
}

VB Signature:

Declare Function WSAData Lib "ws2_32.dll" (TODO) As TODO

User-Defined Types:

None.

Notes:

Used in calling WSAStartup.

Tips & Tricks:

Please add some! https://www.pinvoke.net/emoticons/regular_smile.gif

Sample Code:

Please add some!

Alternative Managed API:

Do you know one? Please contribute it!

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).