en:docs:fapi:kbdgetstatus

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

en:docs:fapi:kbdgetstatus [2018/08/31 17:00] (current)
prokushev created
Line 1: Line 1:
 +This call gets the current state of the keyboard.
 +
 +==Syntax==
 + ​KbdGetStatus (StatData, KbdHandle)
 +
 +===Parameters===
 +;StatData (PKBDINFO) - output : Address of the keyboard status structure:
 +:length (USHORT) : Length, in bytes, of this data structure, including length.
 + ​10 ​           Only valid value. ​
 +:sysstate (USHORT) : State as follows:
 + '''​Bit ​               Description'''​
 + ​15-9 ​               Reserved, set to zero. 
 + ​8 ​               Shift return is on. 
 + ​7 ​               Length of the turn-around character (meaningful only if bit 6 is on). 
 + ​6 ​               Turn-around character is modified. ​
 + ​5 ​               Interim character flags are modified. ​
 + ​4 ​               Shift state is modified. ​
 + ​3 ​               ASCII mode is on. 
 + ​2 ​               Binary mode is on. 
 + ​1 ​               Echo off. 
 + ​0 ​               Echo on. 
 +:​turnchardef (USHORT) : Definition of the turn-around character. In ASCII and extended-ASCII format, the turn-around character is defined as the carriage return. In ASCII format only, the turn-around character is defined in the low-order byte. 
 +:​intcharflag (USHORT) : Interim character flags:
 + ​Bit ​    ​Description
 + ​15-8 ​   NLS shift state. ​
 + ​7 ​      ​Interim character flag is on. 
 + ​6 ​      ​Reserved,​ set to zero. 
 + ​5 ​      ​Application requested immediate conversion. ​
 + ​4-0 ​    ​Reserved,​ set to zero. 
 +:shiftstate (USHORT) : Shift state as follows:
 + '''​Bit ​                       Description'''​
 + ​15 ​                       SysReq key down 
 + ​14 ​                       CapsLock key down 
 + ​13 ​                       NumLock key down 
 + ​12 ​                       ScrollLock key down 
 + ​11 ​                       Right Alt key down 
 + ​10 ​                       Right Ctrl key down 
 + ​9 ​                       Left Alt key down 
 + ​8 ​                       Left Ctrl key down 
 + ​7 ​                       Insert on 
 + ​6 ​                       CapsLock on 
 + ​5 ​                       NumLock on 
 + ​4 ​                       ScrollLock on 
 + ​3 ​                       Either Alt key down 
 + ​2 ​                       Either Ctrl key down 
 + ​1 ​                       Left Shift key down 
 + ​0 ​                       Right Shift key down.
 +; KbdHandle (HKBD) - input : Default keyboard or the logical keyboard.
 +
 +===Return Code===
 + rc (USHORT) - return
 +Return code descriptions are:
 +* 0    NO_ERROR ​
 +* 376        ERROR_KBD_INVALID_LENGTH ​
 +* 439        ERROR_KBD_INVALID_HANDLE ​
 +* 445        ERROR_KBD_FOCUS_REQUIRED ​
 +* 447        ERROR_KBD_KEYBOARD_BUSY ​
 +* 464        ERROR_KBD_DETACHED ​
 +* 504        ERROR_KBD_EXTENDED_SG
 +
 +==Remarks==
 +The initial state of the keyboard is established by the system at application load time. Some default states may be modified by the application through KbdSetStatus. KbdGetStatus returns only those keyboard parameters initially set by KbdSetStatus. The returned parameters are:
 +* Input Mode 
 +* Interim Character Flags 
 +* Shift State 
 +* Echo State 
 +* Turnaround Character ​
 +KbdGetStatus completes only when the handle has access to the physical keyboard (focus) or the handle is 0 and no other handle has the focus.
 +
 +===Family API Considerations===
 +Some options operate differently in the DOS mode than in the OS/2 mode. Therefore, the following restrictions apply to KbdGetStatus when coding in the DOS mode:
 +* Interim character is not supported ​
 +* TurnAround character is not supported ​
 +* NLS_SHIFT_STATE is always NULL.
 +* KbdHandle is ignored.
 +
 +==Example Code==
 +===C Binding===
 +<PRE>
 +typedef struct _KBDINFO {     /* kbst */
 +  USHORT cb;                  /* length in bytes of this structure */
 +  USHORT fsMask; ​             /* bit mask of functions to be altered */
 +  USHORT chTurnAround; ​       /* define TurnAround character */
 +  USHORT fsInterim; ​          /* interim character flags */
 +  USHORT fsState; ​            /* shift states */
 +}KBDINFO;
 +
 +#define INCL_KBD
 +
 +USHORT ​ rc = KbdGetStatus(Structure,​ KbdHandle);
 +
 +PKBDINFO ​        ​Structure; ​    /* Data structure */
 +HKBD             ​KbdHandle; ​    /* Keyboard handle */
 +
 +USHORT ​          ​rc; ​           /* return code */
 +</​PRE>​
 +
 +===MASM Binding===
 +<PRE>
 +KBDINFO struc
 +  kbst_cb ​          ​dw ​ ? ;length in bytes of this structure
 +  kbst_fsMask ​      ​dw ​ ? ;bit mask of functions to be altered
 +  kbst_chTurnAround dw  ? ;define TurnAround character
 +  kbst_fsInterim ​   dw  ? ;interim character flags
 +  kbst_fsState ​     dw  ? ;shift states
 +KBDINFO ends
 +
 +EXTRN  KbdGetStatus:​FAR
 +INCL_KBD ​           EQU 1
 +
 +PUSH@  OTHER   ​Structure ​    ;Data structure
 +PUSH   ​WORD ​   KbdHandle ​    ;​Keyboard handle
 +CALL   ​KbdGetStatus
 +
 +Returns WORD
 +</​PRE>​
 +
 +
 +
 +
 +====== Note ======
 +
 +This text based on [[http://​www.edm2.com/​index.php/​KbdGetStatus_(FAPI)]]
 +
 +{{page>​en:​templates:​fapi}}
 +
  

en/docs/fapi/kbdgetstatus.txt · Last modified: 2018/08/31 17:00 by prokushev