eject / safely remove drive by letter

[sarthemaker]

Is there some kind of command or API to eject a drive by it's letter? such as Eject("E")

 

[jmcilhinney]

pinvoke.net: CM_Request_Device_Eject (setupapi)

I've never used or even heard of that function before. I just went to PInvoke.net and searched for "eject". You might have to do some reading to determine how to determine the device handle.