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4/8/2010

This function displays a dialog box for the error that is passed to it, if an appropriate dialog box exists. If the FLAGS_ERROR_UI_FILTER_FOR_ERRORS flag is used, the function also checks the headers for any hidden errors and displays a dialog box if needed.

Syntax 

DWORD InternetErrorDlg(
  HWND 
hWnd, 
  HINTERNET 
hRequest,
  DWORD
 dwError, 
  DWORD
 dwFlags, 
  LPVOID* 
lppvData
);

Parameters

hWnd

[in] Handle to the parent window for any needed dialog box. This parameter can be NULL if no dialog box is needed.

hRequest

[in, out] HINTERNET handle to the Internet connection used in the call to HttpSendRequest.

dwError

[in] Error value for which to display a dialog box. The following table shows the possible values. This parameter can be one of these values.

Value Description

ERROR_INTERNET_HTTP_TO_HTTPS_ON_REDIR

Notifies the user of the zone crossing to and from a secure site.

ERROR_INTERNET_INCORRECT_PASSWORD

Displays a dialog box for obtaining the user's name and password.

ERROR_INTERNET_POST_IS_NON_SECURE

Displays a warning about posting data to the server through a nonsecure connection.

ERROR_INTERNET_SEC_CERT_CN_INVALID

Indicates that the SSL certificate Common Name (hostname field) is incorrect. Displays an Invalid SSL Common Name dialog box, and lets the user view the incorrect certificate. Also allows the user to select a certificate in response to a server request.

ERROR_INTERNET_SEC_CERT_DATE_INVALID

Tells the user that the SSL certificate has expired.
dwFlags

[in] Unsigned long integer value that contains the action flags. The following table shows the possible values. These values can be used in any combination.

Value Description

FLAGS_ERROR_UI_FILTER_FOR_ERRORS

Scans the returned headers for errors. Call after using HttpSendRequest. This option detects any hidden errors, such as an authentication error.

FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS

If the function succeeds, stores the results of the dialog box in the Internet handle.

FLAGS_ERROR_UI_FLAGS_GENERATE_DATA

Queries the Internet handle for needed information. The function constructs the appropriate data structure for the error. (For example, for Cert CN failures, the function grabs the certificate.)

FLAGS_ERROR_UI_SERIALIZE_DIALOGS

Serializes authentication dialog boxes for concurrent requests on a password cache entry. The lppvDataparameter should contain the address of a pointer to an INTERNET_AUTH_NOTIFY_DATAstructure, and the client should implement a thread-safe, nonblocking callback function.
lppvData

[in, out] Address of a data structure. The structure can be different for each error that needs to be handled.

Return Value

The following table shows the possible return values.

Value Description

ERROR_SUCCESS

The function completed successfully.

ERROR_CANCELLED

The function was cancelled by the user.

ERROR_INTERNET_FORCE_RETRY

The function needs to redo its request.

Remarks

Authentication errors are hidden, because the call to HttpSendRequestwill complete successfully, but the status code would indicate that the proxy or server requires authentication. The FLAGS_ERROR_UI_FILTER_FOR_ERRORS flag causes the function to search the headers for status codes that indicate user input is needed.

Requirements

Header wininet.h
Library wininet.lib
Windows Embedded CE Windows CE 2.12 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also