The AVIWIN sample demonstrates how you can open and close AVI files in the background while playing another AVI file. This sample also demonstrates the MCI_WINDOW and MCI_PUT commands.

NOTE: The Open command takes 1 to 2 seconds to complete. On slower machines, the playback of one AVI is slightly disrupted if you try to open another AVI file in the background. This disruption might cause some video frames to be dropped or skipped.

When you run the AVIWIN.EXE file, remember that you can only play an AVI if you have already opened it. The menu items are always enabled, even when the command should not be run. For example, the Play menu commands are always enabled, even when the MCI_PLAY command would fail. If you try to play an AVI before you open it, you get the following message box: If you click "Yes," you see the error message that returned from the mciSendCommand() function. If you click "No," the focus returns to the AVIWIN.EXE file, and you are then able to open an AVI file.

The following files are available for download from the Microsoft Download Center:


Aviwin.exe (http://download.microsoft.com/download/win31/utility4/1/w31/en-us/aviwin.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. This sample was written in Microsoft Visual C++ version 1.5. The source files of the AVIWIN are listed below and are contained in the archive file AVIWIN.EXE.