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Status Callback Functions
A capture window can send messages to the status callback function while
capturing video to disk or during other lengthy operations to notify your
application of the progress of an operation. The status information includes a message
identifier and a formatted text string ready for display. Your application can
use the message identifier to filter the notifications and limit the messages to
present to the user. During capture operations, the first message sent to the
callback function is always IDS_CAP_BEGIN and the last is always IDS_CAP_END. A
message identifier of zero indicates a new operation is starting and the
callback function should clear the current status.
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