InternetConfirmZoneCrossing function (wininet.h)

Checks for changes between secure and nonsecure URLs. Always inform the user when a change occurs in security between two URLs. Typically, an application should allow the user to acknowledge the change through interaction with a dialog box.


DWORD InternetConfirmZoneCrossing(
  [in] HWND  hWnd,
  [in] LPSTR szUrlPrev,
  [in] LPSTR szUrlNew,
  [in] BOOL  bPost


[in] hWnd

Handle to the parent window for any required dialog box.

[in] szUrlPrev

Pointer to a null-terminated string that specifies the URL that was viewed before the current request was made.

[in] szUrlNew

Pointer to a null-terminated string that specifies the new URL that the user has requested to view.

[in] bPost

Not implemented.

Return value

Returns one of the following values.

Return code Description
The user confirmed that it was okay to continue, or there was no user input required.
The user canceled the request.
There is not enough memory to carry out the request.


Always inform the user when a change in security level occurs, or you risk subjecting the user to 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).


Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header wininet.h
Library Wininet.lib
DLL Wininet.dll

See also

Enabling Internet Functionality

WinINet Functions