step

The step command steps the play one or more frames forward or reverse. The default action is to step forward one frame. Digital-video, VCR, and CAV-format videodisc devices recognize this command.

wsprintf(lpstrCommand, "step %s %s %s", lpszDeviceID, lpszStepFlags, 
    lpszFlags); 
 

Parameters

lpszDeviceID

Identifier of an MCI device. This identifier or alias is assigned when the device is opened.

lpszStepFlags

One or both of the following flags:

by frames	Indicates the number of frames to step. If you specify a negative frames value, you cannot specify the "reverse" flag.
reverse	Step the frames in reverse.

lpszFlags

Can be "wait", "notify", or both. For digital-video and VCR devices, "test" can also be specified. For more information about these flags, see The Wait, Notify, and Test Flags.

Return Values

Returns zero if successful or an error otherwise.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.

See Also

MCI Overview, MCI Command Strings