Function 5F03h Make Network Connection

mov bl, DevCode ;device code

mov cx, UserVal ;user value

mov si, seg LocalBuffer

mov ds, si

mov si, offset LocalBuffer ;ds:si points to buffer for local name

mov di, seg NetBuffer

mov es, di

mov di, offset NetBuffer ;es:di points to buffer for network name

mov ax, 5F03h ;Make Network Connection

int 21h

jc error_handler ;carry set means error

Make Network Connection (Function 5F03h) creates a connection to a network device or drive, or redirects a local device or drive if a local name is specified.

Parameters

DevCode

Specifies the local-device code (03h = printer, 04h = disk drive).

UserVal

Specifies a user value to be saved and returned to a program that calls Get Assign-List Entry (Function 5F02h).

LocalBuffer

Points to a zero-terminated ASCII string that specifies the local device to redirect.

If the DevCode parameter is 03h, the local device is a printer and the device the LocalBuffer parameter points to must be PRN, LPT1, LPT2, or LPT3.

If DevCode is 04h, the local device is a disk drive and LocalBuffer must specify either a drive letter followed by a colon or a null string (a string whose first character is zero). If LocalBuffer specifies a drive letter, MS-DOS redirects the drive to the network device. If LocalBuffer is a null string, MS-DOS attempts to provide access to the network device without redirecting a local disk drive.

NetBuffer

Points to two consecutive zero-terminated ASCII strings that specify the network name and the password for the network drive or device. If the network device has no password, the second string must be a null string. For information about network drives, see Chapter 3, “File Systems.”

Return Value

If the function is successful, the carry flag is clear. Otherwise, the carry flag is set and the AX register contains an error value, which may be one of the following:

Value

Name

0001h	ERROR_INVALID_FUNCTION
0003h	ERROR_PATH_NOT_FOUND
0005h	ERROR_ACCESS_DENIED
0008h	ERROR_NOT_ENOUGH_MEMORY
000Fh	ERROR_INVALID_DRIVE
0012h	ERROR_NO_MORE_FILES
0057h	ERROR_INVALID_PARAMETER

Comments

This function returns 0001h (ERROR_INVALID_FUNCTION) if the network is not running.

If the function returns 0005h (ERROR_ACCESS_DENIED), it may mean either that the password is not valid or that the specified device or drive could not be found on the server.