subcalls.hlp (
Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software,
purely for historical purposes.
If you're looking for up-to-date documentation, particularly for programming,
you should not rely on the information found here, as it will be woefully
out of date.
KbdFreeFocus (1.2)
◄Overview► ◄Up► ◄Next► ◄Previous►
────────────────────────────────────────────────────────────────────────────
#define INCL_KBD
USHORT KbdFreeFocus(hkbd)
HKBD hkbd; /* keyboard handle */
The KbdFreeFocus function frees the focus from the specified logical
keyboard. Other logical keyboards can then use the focus.
Parameter Description
────────────────────────────────────────────────────────────────────────────
hkbd Identifies the logical keyboard that loses the focus. The handle
must have been created previously by using the KbdOpen function.
Return Value
The return value is zero if the function is successful. Otherwise, it is an
error value, which may be one of the following:
ERROR_KBD_DETACHED
ERROR_KBD_INVALID_HANDLE
ERROR_KBD_FOCUS_REQUIRED
Comments
If a process has been waiting for the focus as a result of calling the
KbdGetFocus function, MS OS/2 assigns the focus to the logical keyboard as
soon as it is free. If more than one process is waiting, MS OS/2 chooses a
logical keyboard and assigns the focus. The other processes continue to wait
until the focus is free.
Example
This example frees a logical keyboard: if other logical keyboards have been
waiting, MS OS/2 assigns the focus to one of them; if no other logical
keyboards have been waiting, MS OS/2 uses the default keyboard:
HKBD hkbd;
KbdOpen(&hkbd);
KbdGetFocus(IO_WAIT, hkbd); /* gets focus */
.
.
.
KbdFreeFocus(hkbd); /* frees focus */
See Also
KbdGetFocus, KbdOpen
♦