DosQCurDisk

Legacy Function Warning
It is recommended to use a newer replacement for this function.
Replacement:	DosQueryCurrentDisk
Remarks:

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

Syntax

DosQCurDisk (DriveNumber, LogicalDriveMap)

Parameters

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.

Return Code

rc (USHORT) - return Return code description is:

• 0 NO_ERROR

Example Code

C Binding

#define INCL_DOSFILEMGR

USHORT  rc = DosQCurDisk(DriveNumber, LogicalDriveMap);

PUSHORT          DriveNumber;     /* Default drive number (returned) */
PULONG           LogicalDriveMap; /* Drive map area (returned) */

USHORT           rc;              /* return code */

MASM Binding

EXTRN  DosQCurDisk:FAR
INCL_DOSFILEMGR     EQU 1

PUSH@  WORD    DriveNumber     ;Default drive number (returned)
PUSH@  DWORD   LogicalDriveMap ;Drive map area (returned)
CALL   DosQCurDisk

Returns WORD