DosQCurDisk

Bindings:  C, MASM 

This call determines the current default drive for the requesting process. 
 

 DosQCurDisk     (DriveNumber, LogicalDriveMap) 
 

 DriveNumber (PUSHORT) - output 
    Address of the number of the default drive, for example: 

    Value     Definition 
    1         A 
    2         B 
    .           
    .           
    .           

 LogicalDriveMap (PULONG) - output 
    Address of the bit map (stored in the low-order portion of the 32-bit, 
    doubleword area) where the system returns the mapping of the logical 
    drives.  Logical Drives A to Z have a one-to-one mapping with the bit 
    positions 0 to 25 of the map; for example, bit 0 is drive A, bit 1 is 
    drive B, and so forth. The settings of these bits indicate which 
    drives exist: 

    Value     Definition 
    0         The logical drive does not exist. 
    1         The logical drive exists. 

 rc (USHORT) - return 
    Return code description is: 

    0         NO_ERROR