plogical (PULONG) - output

Address of the bit map where the system returns the mapping of the logical drives.

This bit map is stored in the low-order portion of the 32-bit area.

Logical drives A to Z have one-to-one mapping with bit positions 0 to 25 of the map; for example, bit 0 represents drive A, bit 1 represents drive B, and so on. The settings of these bits indicate which drives exist, as follows:

• The logical drive does not exist.
  
• The logical drive exists.