[2005] how do i use "GetAsyncKeyState" API.

[balam]

hi all,

i am facing problem in using this API "GetAsyncKeyState" can any body please give some coding or some important hints regarding this problem, how could i use it, because i did all possible search but unable to find.

please help me............


regards

[.paul.]

have a look at my keycodes utility in my signature.

heres the declaration for the api

Public Declare Function GetAsyncKeyState Lib "user32" Alias "GetAsyncKeyState" (ByVal vKey As Integer) As Integer

to use it

if GetAsyncKeyState(keycode) then
   'key is depressed
end if

[balam]

In keycode there i will give the code of key as like 32 to 120, but i require that it should give me a keypressed value in generating message.

thanks

[.paul.]

have a look at the hotkeys link in my signature

[balam]

my dear, i am agian disturbing you because, problem is not solved , i am going to use "GetAsyncKeyState" API to generate a messagebox to show keypressed value, when i press any key from keyboard.

[.paul.]

GetAsyncKeyState doesn't notify you when a key is pressed. you call GetAsyncKeyState to check if a key is being held down.

try this

Public Class Form1
 
    Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
        MsgBox(e.KeyChar)
    End Sub
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.KeyPreview = True
    End Sub
 
 
End Class

[.paul.]

is this for a keylogger?

[balam]

thanks for taking some time to answer my question but, the coding that i am sending you it belongs to vb 6.0, it is all functioning well and giving accurate result as i require,but i am unable to convert it in vb.NET 2005

if you have some time then i will request you how to convert this code in vb.NET 2005

//In module

Public Const DT_CENTER = &H1
Public Const DT_WORDBREAK = &H10
Type RECT
    Left As Long
    Top As Long
    Right As Long
    Bottom As Long
End Type
Declare Function DrawTextEx Lib "user32" Alias "DrawTextExA" (ByVal hDC As Long, ByVal lpsz As String, ByVal n As Long, lpRect As RECT, ByVal un As Long, ByVal lpDrawTextParams As Any) As Long
Declare Function SetTimer Lib "user32" (ByVal hwnd As Long, ByVal nIDEvent As Long, ByVal uElapse As Long, ByVal lpTimerFunc As Long) As Long
Declare Function KillTimer Lib "user32" (ByVal hwnd As Long, ByVal nIDEvent As Long) As Long
Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Long) As Integer
Declare Function SetRect Lib "user32" (lpRect As RECT, ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long
Global Cnt As Long, sSave As String, sOld As String, Ret As String
Dim Tel As Long
Function GetPressedKey() As String
    For Cnt = 32 To 128
        'Get the keystate of a specified key
        If GetAsyncKeyState(Cnt) <> 0 Then
            GetPressedKey = Chr$(Cnt)
            Exit For
        End If
    Next Cnt
End Function
Sub TimerProc(ByVal hwnd As Long, ByVal nIDEvent As Long, ByVal uElapse As Long, ByVal lpTimerFunc As Long)
    Ret = GetPressedKey
    If Ret <> sOld Then
        sOld = Ret
        sSave = sSave + sOld
    End If
End Sub

//In Form1
Private Sub Form_Load()
        Me.Caption = "action form"
        SetTimer Me.hwnd, 0, 1, AddressOf TimerProc
End Sub
Private Sub Form_Paint()
    Dim R As RECT
    Const mStr = "Start from here."
    'Clear the form
    Me.Cls
    'API uses pixels
    Me.ScaleMode = vbPixels
    'Set the rectangle's values
    SetRect R, 0, 0, Me.ScaleWidth, Me.ScaleHeight
    'Draw the text on the form
    DrawTextEx Me.hDC, mStr, Len(mStr), R, DT_WORDBREAK Or DT_CENTER, ByVal 0&
End Sub
Private Sub Form_Resize()
    Form_Paint
End Sub
Private Sub Form_Unload(Cancel As Integer)
    'Kill our API-timer
    KillTimer Me.hwnd, 0
    'Show all the typed keys
    MsgBox sSave
End Sub

[.paul.]

thats a keylogger. its against the policy of this forum to assist with malicious software

[balam]

my post #8 contains "GetAsyncKeyState" API, so how to use it in vb.NET

best wished for you in completion of my work