KbdOpen

Description

This call creates a new logical keyboard.

Syntax

KbdOpen (KbdHandle)

Parameters

KbdHandle (PHKBD) - output

Address of the logical keyboard.

Return Code

rc (USHORT) - return

Return code descriptions are:

• 0 NO_ERROR
• 440 ERROR_KBD_NO_MORE_HANDLE
• 441 ERROR_KBD_CANNOT_CREATE_KCB
• 464 ERROR_KBD_DETACHED
• 504 ERROR_KBD_EXTENDED_SG

Remarks

KbdOpen blocks while another thread has the keyboard focus (by way of KbdGetFocus) until the thread with the focus issues KbdFreeFocus. Therefore, to prevent KbdOpen from blocking, it is recommended that KbdOpen be issued only while the current thread has the focus. For example:

KbdGetFocus

wait until focus available on handle 0

KbdOpen

get a logical keyboard handle

KbdOpen

get another logical keyboard handle

KbdOpen

get yet another logical keyboard handle

KbdFreeFocus

give up the focus on handle 0.

Example Code

C Binding

#define INCL_KBD

USHORT  rc = KbdOpen(KbdHandle);

PHKBD            KbdHandle;     /* Keyboard handle */

USHORT           rc;            /* return code */

MASM Binding

EXTRN  KbdOpen:FAR
INCL_KBD            EQU 1

PUSH@  WORD    KbdHandle     ;Keyboard handle
CALL   KbdOpen

Returns WORD