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Posted 24 Jan 2005


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Open and Close CD drive in C#

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24 Jan 2005CPOL
An article on how to open and close the CD drive from your C# program.

Sample Image - Not really nessesary


I was looking for code in C# to open/close the CD drive so I could make a funny program that when run would open the CD drive every five minutes and play with it "Another cup holder for your tea governor?". Yea, anyways, to my surprise, I couldn't find it.


To continue my story, I was searching the net and I found a simple code in VB. Well, I don't know VB, but I do know some other languages, and to my surprise, I was actually able to translate it.

Using the Code

Well, first you have to import a DLL and a variable for the return status.

[DllImport("winmm.dll", EntryPoint="mciSendStringA")]
public static extern void mciSendStringA(string lpstrCommand, 
       string lpstrReturnString, long uReturnLength, long hwndCallback);

string rt = "";

Now, all you have to do is call it like this to open/ close the CD drive:

mciSendStringA("set CDAudio door open",rt,127,0);

mciSendStringA("set CDAudio door closed",rt,127,0);

Points of Interest

It's pretty short. I'm pretty happy with the results of that British joke!


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Jason Iwachow
Canada Canada
No Biography provided

Comments and Discussions

Generalmore then one CD drive ... Pin
Anonymous24-Jan-05 5:24
MemberAnonymous24-Jan-05 5:24 
GeneralRe: more then one CD drive ... Pin
mav.northwind24-Jan-05 7:27
Membermav.northwind24-Jan-05 7:27 
GeneralIncorrect mciSendStringA declaration Pin
mav.northwind24-Jan-05 2:23
Membermav.northwind24-Jan-05 2:23 
GeneralRe: Incorrect mciSendStringA declaration Pin
Uwe Keim24-Jan-05 6:56
sitebuilderUwe Keim24-Jan-05 6:56 

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