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Prototype for an application-defined status callback function.

The INTERNET_STATUS_CALLBACK type defines a pointer to this callback function.InternetStatusCallback is a placeholder for the application-defined function name.

Syntax

Parameters

hInternet

The handle for which the callback function is called.

dwContext

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A pointer to a variable that specifies the application-defined context value associated withhInternet.

dwInternetStatus

A status code that indicates why the callback function is called. This parameter can be one of the following values.

ValueMeaning
INTERNET_STATUS_CLOSING_CONNECTION
Closing the connection to the server. The lpvStatusInformation parameter is NULL.
INTERNET_STATUS_CONNECTED_TO_SERVER
Successfully connected to the socket address (SOCKADDR) pointed to by lpvStatusInformation.
INTERNET_STATUS_CONNECTING_TO_SERVER
Connecting to the socket address (SOCKADDR) pointed to by lpvStatusInformation.
INTERNET_STATUS_CONNECTION_CLOSED
Successfully closed the connection to the server. The lpvStatusInformation parameter is NULL.
INTERNET_STATUS_COOKIE_HISTORY
Retrieving content from the cache. Contains data about past cookie events for the URL such as if cookies were accepted, rejected, downgraded, or leashed.

ThelpvStatusInformation parameter is a pointer to an InternetCookieHistory structure.

INTERNET_STATUS_COOKIE_RECEIVED
Indicates the number of cookies that were accepted, rejected, downgraded (changed from persistent to session cookies), or leashed (will be sent out only in 1st party context). The lpvStatusInformation parameter is a DWORD with the number of cookies received.
INTERNET_STATUS_COOKIE_SENT
Indicates the number of cookies that were either sent or suppressed, when a request is sent. The lpvStatusInformation parameter is a DWORD with the number of cookies sent or suppressed.
INTERNET_STATUS_CTL_RESPONSE_RECEIVED
Not implemented.
INTERNET_STATUS_DETECTING_PROXY
Notifies the client application that a proxy has been detected.
INTERNET_STATUS_HANDLE_CLOSING
This handle value has been terminated. pvStatusInformation contains the address of the handle being closed. The lpvStatusInformation parameter contains the address of the handle being closed.
INTERNET_STATUS_HANDLE_CREATED
Used by InternetConnect to indicate it has created the new handle. This lets the application call InternetCloseHandle from another thread, if the connect is taking too long. The lpvStatusInformation parameter contains the address of an HINTERNET handle.
INTERNET_STATUS_INTERMEDIATE_RESPONSE
Received an intermediate (100 level) status code message from the server.
INTERNET_STATUS_NAME_RESOLVED
Successfully found the IP address of the name contained in lpvStatusInformation. The lpvStatusInformation parameter points to a PCTSTR containing the host name.
INTERNET_STATUS_P3P_HEADER
The response has a P3P header in it.
INTERNET_STATUS_P3P_POLICYREF
Not implemented.
INTERNET_STATUS_PREFETCH
Not implemented.
INTERNET_STATUS_PRIVACY_IMPACTED
Not implemented.
INTERNET_STATUS_RECEIVING_RESPONSE
Waiting for the server to respond to a request. The lpvStatusInformation parameter is NULL.
INTERNET_STATUS_REDIRECT
An HTTP request is about to automatically redirect the request. The lpvStatusInformation parameter points to the new URL. At this point, the application can read any data returned by the server with the redirect response and can query the response headers. It can also cancel the operation by closing the handle. This callback is not made if the original request specified INTERNET_FLAG_NO_AUTO_REDIRECT.
INTERNET_STATUS_REQUEST_COMPLETE
An asynchronous operation has been completed. The lpvStatusInformation parameter contains the address of an INTERNET_ASYNC_RESULT structure.
INTERNET_STATUS_REQUEST_SENT
Successfully sent the information request to the server. The lpvStatusInformation parameter points to a DWORD value that contains the number of bytes sent.
INTERNET_STATUS_RESOLVING_NAME
Looking up the IP address of the name contained in lpvStatusInformation. The lpvStatusInformation parameter points to a PCTSTR containing the host name.
INTERNET_STATUS_RESPONSE_RECEIVED
Successfully received a response from the server.
INTERNET_STATUS_SENDING_REQUEST
Sending the information request to the server. The lpvStatusInformation parameter is NULL.
INTERNET_STATUS_STATE_CHANGE
Moved between a secure (HTTPS) and a nonsecure (HTTP) site. The user must be informed of this change; otherwise, the user is at risk of disclosing sensitive information involuntarily. When this flag is set, the lpvStatusInformation parameter points to a status DWORD that contains additional flags.
Internet

lpvStatusInformation

A pointer to additional status information. When the INTERNET_STATUS_STATE_CHANGE flag is set, lpvStatusInformation points to a DWORD that contains one or more of the following flags:

ValueMeaning
INTERNET_STATE_CONNECTED
Connected state. Mutually exclusive with disconnected state.
INTERNET_STATE_DISCONNECTED
Disconnected state. No network connection could be established.
INTERNET_STATE_DISCONNECTED_BY_USER
Disconnected by user request.
INTERNET_STATE_IDLE
No network requests are being made by Windows Internet.
INTERNET_STATE_BUSY
Network requests are being made by Windows Internet.
INTERNET_STATUS_USER_INPUT_REQUIRED
The request requires user input to be completed.

dwStatusInformationLength

The size, in bytes, of the data pointed to bylpvStatusInformation.

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Return value

None

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Remarks

Because callbacks are made during processing of the request, the application should spend little time in the callback function to avoid degrading data throughput on the network. For example, displaying a dialog box in a callback function can be such a lengthy operation that the server terminates the request.

The callback function can be called in a thread context different from the thread that initiated the request.

Caution Always notify the user when a state change from a secure (HTTPS) site to a nonsecure (HTTP) site occurs, to guard against involuntary information disclosure.
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

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Minimum supported clientWindows 2000 Professional [desktop apps only]
Minimum supported serverWindows 2000 Server [desktop apps only]
Target PlatformWindows
Headerwininet.h

See also

Your printer might appear offline if it can't communicate with your PC. Here are some things to try to get your printer back online.

  1. Check to make sure the printer is turned on and connected to the same Wi-Fi network as your PC. Your printer's built-in menu should show which network it's connected to, or check your printer's manual for more info.

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  3. If these steps don't put your printer back online, then read Troubleshooting offline printer problems.

Fix printer connection and printing problems in Windows 10.
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