DosSelectDisk

Bindings:  C, MASM 

This call selects the drive specified as the default drive for the calling 
process. 

 DosSelectDisk     (DriveNumber) 
 

 DriveNumber (USHORT) - input 
    New default drive number, where 1 = A and 2 = B and so on. 

 rc (USHORT) - return 
    Return code descriptions are: 

    0         NO_ERROR 
    15        ERROR_INVALID_DRIVE