>You can try this:
>
>
>FUNCTION DriveReady

I wouldn't make assumptions regarding the state of Windows error handling. You'd be better off using the following to set and restore:

#define SEM_FAILCRITICALERRORS      0x0001
lnprevmode = SetErrorMode(SEM_FAILCRITICALERRORS)
*
* Code here
* 
= SetErrorMode(lnprevmode)