Sensoray 811 Windows SDK - Manual (Page 18)

Parameters
bDisplayVideo
TRUE to enable preview.
devid
device id in the system (use 0 for first channel with a single board installed).
Returns
0 on success, negative value if error (see mid811types.h for error codes list).
MID811_API int S811_GetRenderVideo(
BOOL *bDisplayVideo,
int devid
);
Retrieves the preview setting.
Parameters
bDisplayVideo
pointer to retrieved setting.
devid
device id in the system (use 0 for first channel with a single board installed).
Returns
0 on success, negative value if error (see mid811types.h for error codes list).
MID811_API int S811_Repaint(
HDC hdc
);
Repaint callback, should be called when application receives a WM_PAINT event. This is necessary
to notify the video renderer of a repaint event.
Parameters
hdc
device context handle or NULL if unknown.
Returns
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