KbdOpen

This call creates a new logical keyboard.

 KbdOpen (KbdHandle)

• KbdHandle (PHKBD) - output : Address of the logical keyboard.

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

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.

#define INCL_KBD
 
USHORT  rc = KbdOpen(KbdHandle);
PHKBD   KbdHandle;     /* Keyboard handle */
 
USHORT  rc;            /* return code */

EXTRN  KbdOpen:FAR
INCL_KBD            EQU 1
 
PUSH@  WORD    KbdHandle     ;Keyboard handle
CALL   KbdOpen
 
Returns WORD