probe for drive letter assignment

in a windows console how can i get the drive letter of the available cd rom drive? Can i use one of the C++ functions or this going to be a windows specific function form windows headers?

this IS OS specific,

the following code should find all the CD-ROM drives

Code:

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#include <direct.h> //MSVC i don't know on other compilers...
#include <windows.h>
#include <stdio.h>

int main(void)
{
    int i = 0;
    char buf[20];
    for(;i < 26;i++)
    {
        if(!_chdrive(i))
        {
            sprintf(buf,"%c:\\",i+ 'A' - 1);
            if(GetDriveType(buf) == DRIVE_CDROM)
                printf("CD-ROM on Drive:%s",buf);// FOUND CD-ROM do whatever...
        }

    }
    return 0;
}

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those developers!!!

direct.h isnt in UNIX, i believe ..