DosQCurDisk: Difference between revisions
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This call determines the current default drive for the requesting process. | This call determines the current default drive for the requesting process. | ||
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==Parameters== | ==Parameters== | ||
;DriveNumber (PUSHORT) - output : Address of the number of the default drive, for example: | ;DriveNumber (PUSHORT) - output : Address of the number of the default drive, for example: | ||
::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: | ;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: | ||
::0 - The logical drive does not exist. | |||
::1 - The logical drive exists. | |||
==Return Code== | ==Return Code== | ||
rc (USHORT) - return | ;rc (USHORT) - return:Return code description is: | ||
Return code description is: | * 0 NO_ERROR | ||
* 0 | |||
== | ==Bindings== | ||
=== C | ===C=== | ||
<PRE> | <PRE> | ||
#define INCL_DOSFILEMGR | #define INCL_DOSFILEMGR | ||
USHORT rc = DosQCurDisk(DriveNumber, LogicalDriveMap); | USHORT rc = DosQCurDisk(DriveNumber, LogicalDriveMap); | ||
PUSHORT DriveNumber; /* Default drive number (returned) */ | |||
PULONG LogicalDriveMap; /* Drive map area (returned) */ | |||
USHORT rc; /* return code */ | |||
USHORT | |||
</PRE> | </PRE> | ||
===MASM | ===MASM=== | ||
<PRE> | <PRE> | ||
EXTRN DosQCurDisk:FAR | EXTRN DosQCurDisk:FAR | ||
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</PRE> | </PRE> | ||
[[Category:Dos16]] | |||
[[Category: | |||
Latest revision as of 06:04, 26 January 2020
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:
- 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:
- 0 - The logical drive does not exist.
- 1 - The logical drive exists.
Return Code
- rc (USHORT) - return
- Return code description is:
- 0 NO_ERROR
Bindings
C
#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
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