KbdClose
This call closes the existing logical keyboard identified by the keyboard handle.
KbdClose (KbdHandle)
KbdHandle (HKBD) - input Default keyboard or the logical keyboard.
rc (USHORT) - return Return code descriptions are:
0 | NO_ERROR |
439 | ERROR_KBD_INVALID_HANDLE |
464 | ERROR_KBD_DETACHED |
504 | ERROR_KBD_EXTENDED_SG |
Remarks
KbdClose blocks while another thread has the keyboard focus (by way of KbdGetFocus) until the thread with the focus issues KbdFreeFocus. Therefore, to prevent KbdClose from blocking, it is recommended that KbdClose be issued only while the current thread has the focus. For example:
- KbdGetFocus Wait until focus available on handle 0.
- KbdClose Close a logical keyboard handle.
- KbdClose Close another logical keyboard handle.
- KbdClose Close still another logical keyboard handle.
- KbdFreeFocus Give up the focus on handle 0.
C bindings
#define INCL_KBD USHORT rc = KbdClose(KbdHandle); HKBD KbdHandle; /* Keyboard handle */ USHORT rc; /* return code */
MASM bindings
EXTRN KbdClose:FAR INCL_KBD EQU 1 PUSH WORD KbdHandle ;Keyboard handle CALL KbdClose Returns WORD