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Refer instead to IBindStatusCallbackEx::GetBindInfoEx for a code example. URLDownloadToCacheFile does not support IBindStatusCallbackEx and cannot be used to download files over 4 gigabytes (GB) in size. Use this function to ensure that a file name is returned without unnecessary copying of data. If the given URL is an Internet URL, such as "http:" or "ftp:," URLDownloadToCacheFile downloads this file and returns the local file name of the cached copy. If the given URL is a "file:" URL, URLDownloadToCacheFile directly returns the file name for the "file:" URL, instead of making a copy to the cache. This function always returns a file name, if the download operation succeeds. The client can choose to be notified of progress through a notification callback. The buffer length is invalid, or there is insufficient memory to complete the operation.
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This parameter can be set to NULL if status is not required. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel. When you view the file information, it is converted to local time.
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The download operation can be canceled by returning E_ABORT from any callback. The dates and times for these files are listed in Coordinated Universal Time (UTC). URLDownloadToCacheFile calls the IBindStatusCallback::OnProgress and IBindStatusCallback::OnDataAvailable methods as data is received. By using IBindStatusCallback::OnProgress, a caller can receive download status. Cannot be set to NULL.Īn unsigned long integer value that contains the number of characters of the szFileName value.Ī pointer to the IBindStatusCallback interface of the caller. Cannot be set to NULL.Ī pointer to a string value that contains the name of the downloaded file. The function attempts the download in the context of the ActiveX client framework, and allows the caller container to receive callbacks on the progress of the download.Ī pointer to a string value that contains the URL to download. This parameter represents the outermost IUnknown of the calling component. Otherwise, the caller is a COM object that is contained in another component, such as an ActiveX control in the context of an HTML page. If the caller is not an ActiveX component, this value can be set to NULL. Syntax HRESULT URLDownloadToCacheFile(Ī pointer to the controlling IUnknown interface of the calling ActiveX component, if the caller is an ActiveX component. Downloads data to the Internet cache and returns the file name of the cache location for retrieving the bits.