How to hide, lock or change mouse cursor in unity3d

lets see how to hide , lock or change the appreance of cursor in unity3d

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background music is free and from:

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intro "Video Is Made By Filmora"
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chapters:
0:00 Intro
0:22 how to hide the cursor
1:02 cursor lock types
1:37 unlock the cursor
1:48 lock the cursor
2:45 confine cursor
3:21 change the cursor texture