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InternetSetCookie function

Applies to: desktop apps only

Creates a cookie associated with the specified URL.

Syntax

Copy 
BOOL InternetSetCookie(
  __in  LPCTSTR lpszUrl,
  __in  LPCTSTR lpszCookieName,
  __in  LPCTSTR lpszCookieData
);

Parameters

lpszUrl [in]

Pointer to a null-terminated string that specifies the URL for which the cookie should be set.

lpszCookieName [in]

Pointer to a null-terminated string that specifies the name to be associated with the cookie data. If this parameter is NULL, no name is associated with the cookie.

lpszCookieData [in]

Pointer to the actual data to be associated with the URL.

Return value

Returns TRUE if successful, or FALSE otherwise. To get a specific error message, call GetLastError.

Remarks

Cookies created by InternetSetCookie without an expiration date are stored in memory and are available only in the same process that created them. Cookies that include an expiration date are stored in the windows\cookies directory.

Creating a new cookie might cause a dialog box to appear on the screen asking the user if they want to allow or disallow cookies from this site based on the privacy settings for the user.

Caution  InternetSetCookie will unconditionally create a cookie even if “Block all cookies” is set in Internet Explorer. This behavior can be viewed as a breach of privacy even though such cookies are not subsequently sent back to servers while the “Block all cookies” setting is active. Applications should use InternetSetCookieEx to correctly honor the user's privacy settings.

For more cookie internals, see http://blogs.msdn.com/ieinternals/archive/2009/08/20/WinINET-IE-Cookie-Internals-FAQ.aspx.

Like all other aspects of the WinINet API, this function cannot be safely called from within DllMain or the constructors and destructors of global objects.

Note  WinINet does not support server implementations. In addition, it should not be used from a service. For server implementations or services use Microsoft Windows HTTP Services (WinHTTP).

Requirements

Minimum supported client

Windows 2000 Professional

Minimum supported server

Windows 2000 Server

Header
Wininet.h

Library
Wininet.lib

DLL
Wininet.dll

Unicode and ANSI names

InternetSetCookieW (Unicode) and InternetSetCookieA (ANSI)

See also

HTTP Cookies
Managing Cookies
WinINet Functions
InternetGetCookie
InternetGetCookieEx
InternetSetCookieEx

 

 

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Build date: 2/7/2012

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Annotations FAQ
How about deleting cookie?
Hi, Is there any way to delete the cookie which was set by InternetSetCookie function?
History
Caution: unconditional cookies only
InternetSetCookie will unconditionally create a cookie even if “Block all cookies” is set in Internet Explorer. This behavior might be viewed as a breach of privacy even though such cookies are not subsequently sent back to servers while the “Block all cookies” setting is active.

Applications should use InternetSetCookieEx to correctly honor the user's privacy settings.

For more cookie internals, see http://blogs.msdn.com/ieinternals/archive/2009/08/20/WinINET-IE-Cookie-Internals-FAQ.aspx.
History
This always fails with error code 126 (ERROR_MOD_NOT_FOUND).
I don't know why and I couldn't find relevant information.
History
Be sure to look at 'Managing Cookies' -- name isn't really name, and value sure isn't value.
Here's how the companion topic 'managing cookies' uses this function:
// Create a persistent cookie.
bReturn = InternetSetCookie("http://www.adventure_works.com", NULL,
           "TestData = Test; expires = Sat,01-Jan-2000 00:00:00 GMT");
Note that the name is 'TestData' the value is 'Test' and it's all wrapped in a weirdo, undocumented string.
History