KBDLLHOOKSTRUCT Structure ()

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CBT_CREATEWND
CBTACTIVATESTRUCT
CWPRETSTRUCT
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KBDLLHOOKSTRUCT

MOUSEHOOKSTRUCT
MOUSEHOOKSTRUCTEX
MSLLHOOKSTRUCT

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KBDLLHOOKSTRUCT Structure

KBDLLHOOKSTRUCT Structure

The KBDLLHOOKSTRUCT structure contains information about a low-level keyboard input event.

Syntax

typedef struct {
    DWORD vkCode;
    DWORD scanCode;
    DWORD flags;
    DWORD time;
    ULONG_PTR dwExtraInfo;
} KBDLLHOOKSTRUCT, *PKBDLLHOOKSTRUCT;

Members

vkCode
Specifies a virtual-key code. The code must be a value in the range 1 to 254.
scanCode
Specifies a hardware scan code for the key.
flags
Specifies the extended-key flag, event-injected flag, context code, and transition-state flag. This member is specified as follows. An application can use the following values to test the keystroke flags.
Value Purpose
LLKHF_EXTENDED Test the extended-key flag.
LLKHF_INJECTED Test the event-injected flag.
LLKHF_ALTDOWN Test the context code.
LLKHF_UP Test the transition-state flag.
0
Specifies whether the key is an extended key, such as a function key or a key on the numeric keypad. The value is 1 if the key is an extended key; otherwise, it is 0.
1-3
Reserved.
4
Specifies whether the event was injected. The value is 1 if the event was injected; otherwise, it is 0.
5
Specifies the context code. The value is 1 if the ALT key is pressed; otherwise, it is 0.
6
Reserved.
7
Specifies the transition state. The value is 0 if the key is pressed and 1 if it is being released.
time
Specifies the time stamp for this message, equivalent to what GetMessageTime would return for this message.
dwExtraInfo
Specifies extra information associated with the message.

Value	Purpose
LLKHF_EXTENDED	Test the extended-key flag.
LLKHF_INJECTED	Test the event-injected flag.
LLKHF_ALTDOWN	Test the context code.
LLKHF_UP	Test the transition-state flag.

Structure Information

Header Declared in Winuser.h, include Windows.h
Minimum operating systems Windows NT 4.0 SP3

Header	Declared in Winuser.h, include Windows.h
Minimum operating systems	Windows NT 4.0 SP3

See Also

Hooks Overview, LowLevelKeyboardProc, SetWindowsHookEx

Community Content

Visual Basic 9 declaration

Added by:Đonny

<StructLayout(LayoutKind.Sequential)> _
Public Structure KBDLLHOOKSTRUCT
    Public vkCode As Integer
    Public scanCode As Integer
    Public flags As KBDLLHOOKSTRUCTFlags
    Public time As Integer
    Public dwExtraInfo As IntPtr
End Structure<Flags()> _
Public Enum KBDLLHOOKSTRUCTFlags As Integer
    LLKHF_EXTENDED = &H1
    LLKHF_INJECTED = &H10
    LLKHF_ALTDOWN = &H20
    LLKHF_UP = &H80
End Enum

Declaracion C#

Added by:David_González

[StructLayout(LayoutKind.Sequential)]

publicstructKBDLLHOOKSTRUCT

    ///<summary>

    /// Especifica el codigo de tecla virtual, el codigo esta entre 1 y 254.

    ///</summary>

    publicint vkCode;

    ///<summary>

    /// Especifica el escaneo de hardware del codigo de la tecla

    ///</summary>

    publicint scanCode;

    ///<summary>

    /// especifica flags extendidos, mirar la estrucutra 'KBDLLHOOKSTRUCT' para mas info

    ///</summary>

    publicint flags;

    ///<summary>

    /// especifica el time stamp para este mensaje.

    ///</summary>

    publicint time;

    ///<summary>

    /// Especifica informacion extra para el mensaje

    ///</summary>

    publicint dwExtraInfo;

};