COPYTEST is a sample that contains a complete code module to copy a file of any size and set its file date/time stamp.

The following files are available for download from the Microsoft Download Center:
Download the Copytest.exe package now. (http://download.microsoft.com/download/platformsdk/sample/3.1/w31/en-us/copytest.exe) For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base: Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. Windows contains its own set of file I/O functions to perform the basic operations such as file open, close, read, write, and so forth; however, there is no function to copy a file. The COPY.C module included in this sample can be plugged into any application or dynamic-link library (DLL). Some of the features of this module are:

•	The ability to rename the output file
•	The ability to copy the file date/time stamp and attributes
•	Nondependency upon the C run time due to the use of inline assembly
•	Robust error reporting

For information on how to call the CopyFile() function, please refer to the comment block inside of COPY.C.