Table of Contents
This is part of Family API which allow to create dual-os version of program runs under OS/2 and DOS
Note: This is legacy API call. It is recommended to use 32-bit equivalent
KbdOpen
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.
Bindings
C
#define INCL_KBD USHORT rc = KbdOpen(KbdHandle); PHKBD KbdHandle; /* Keyboard handle */ USHORT rc; /* return code */
MASM
EXTRN KbdOpen:FAR INCL_KBD EQU 1 PUSH@ WORD KbdHandle ;Keyboard handle CALL KbdOpen Returns WORD