Thanks you guys a lot!
After I used the "OI Ready Cam", I think there seems to have been a slight problem:
"After using the OI Ready Cam", the window of octane render loses its function of "button of restore"
Is this my personal problem? Does anyone have the same situation?
To say more more precisely, this problem occurs under the situation of "minimizing the window of octane"(Show Desktop) while "the window of OI Ready Cam" is still opening .