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capPreviewRate
The capPreviewRate macro sets the frame display rate in preview mode. You can use this macro or
explicitly call the WM_CAP_SET_PREVIEWRATE message.
BOOL capPreviewRate(
Parameters
hwnd
Handle of a capture window.
wMS
Rate, in milliseconds, at which new frames are captured and displayed.
Return Values
Returns TRUE if successful or FALSE if the capture window is not connected to
a capture driver.
Remarks
The preview mode uses substantial CPU resources. Applications can disable
preview or lower the preview rate when another application has the focus. During
streaming video capture, the previewing task is lower priority than writing
frames to disk, and preview frames are displayed only if no other buffers are
available for writing.
See Also
WM_CAP_SET_PREVIEWRATE
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