Reading CD-ROM Sectors (raw read) using DeviceIOControl

First of all, sorry for my English, I know it's terrible... :(

Could someone help me ?

I need to read CD sectors with Visual Basic 6.0 and Windows XP. I'm sure it's possible ... but the only one way (that I found) to this raw read is to use the DeviceIoControl API ... Unfortunately to use DeviceIoControl I need some constants (or functions), for example IOCTL_CDROM_GET_DRIVE_GEOMETRY , but it's undeclared in VB help :(
I was unable to find useful information for it, althout it's often mentioned in MSDN . If You know what is IOCTL_CDROM_GET_DRIVE_GEOMETRY please help me .
Thanks in advance

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