How Can I turn off the Caps Lock before running my test script?

Hello Everyone!!

I need to know what I have to do to turns off the Caps Lock during  the execution of my Tests Script, so for I dont have any problems, this is because I use the keys  method to simulate keystroke but if The Caps Lock is turning On My test does not make the action that I programmed

I hope SomeBody Can help me to solve this situation

Thanks