MM_DRVM_DATA

Notifies a video callback function or window that the video capture driver returned the specified buffer to the application.

• No return value.

dwParam1

Address of a VIDEOHDR structure identifying the buffer.

dwParam2

Not used.

For VIDEO_IN channels, buffers are returned when they have been filled. For VIDEO_OUT channels, buffers are returned after they are displayed. All buffers are returned for the DVM_STREAM_RESET message.

This message is used by video capture drivers, installable compressors, and other types of installable drivers to signal an application that new data is available.