KbdSetFgnd: Difference between revisions
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==Description== | ==Description== | ||
This call raises the priority of the foreground keyboard's thread. | This call raises the priority of the foreground keyboard's thread. | ||
==Syntax== | ==Syntax== | ||
KbdSetFgnd ( ) | |||
KbdSetFgnd | |||
==Parameters== | ==Parameters== | ||
rc (USHORT) - return | rc (USHORT) - return | ||
Return code descriptions are: | Return code descriptions are: | ||
* 0 NO_ERROR | |||
* 447 ERROR_KBD_KEYBOARD_BUSY | |||
* 504 ERROR_KBD_EXTENDED_SG | |||
==Return Code== | ==Return Code== | ||
KbdSetFgnd marks the current process that owns the keyboard. Threads in this process receive a priority boost. The previous foreground keyboard threads lose their priority boost. | KbdSetFgnd marks the current process that owns the keyboard. Threads in this process receive a priority boost. The previous foreground keyboard threads lose their priority boost. | ||
This function should only be issued by a Keyboard Subsystem during KbdCharIn or KbdStringIn processing. | This function should only be issued by a Keyboard Subsystem during KbdCharIn or KbdStringIn processing. | ||
==Example Code== | ==Example Code== | ||
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</PRE> | </PRE> | ||
[[Category:Kbd]] | |||
[[Category: | |||
Revision as of 02:48, 5 December 2016
Description
This call raises the priority of the foreground keyboard's thread.
Syntax
KbdSetFgnd ( )
Parameters
rc (USHORT) - return
Return code descriptions are:
- 0 NO_ERROR
- 447 ERROR_KBD_KEYBOARD_BUSY
- 504 ERROR_KBD_EXTENDED_SG
Return Code
KbdSetFgnd marks the current process that owns the keyboard. Threads in this process receive a priority boost. The previous foreground keyboard threads lose their priority boost.
This function should only be issued by a Keyboard Subsystem during KbdCharIn or KbdStringIn processing.
Example Code
C Binding
#define INCL_KBD USHORT rc = KbdSetFgnd(VOID); USHORT rc; /* return code */
MASM Binding
EXTRN KbdSetFgnd:FAR INCL_KBD EQU 1 CALL KbdSetFgnd Returns WORD