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Autor Tema: copiar datos de listview externo con sendmessage ?  (Leído 2,318 veces)
Tengu


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2+1 = 1 , despues de todo , tdo es relativo


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copiar datos de listview externo con sendmessage ?
« en: 10 Febrero 2010, 15:50 pm »

mi duda es la siguiente

lo que quiero hacer es seleccionar una ventana externa teniendo su hwnd y apartir de alli sacar todos los controles que tenga, ya sean frames, labels, textbox, listbox, listview o cualquier tipo de control que pudiera contener strings.

para luego con sendmessage extraer dichos datos a mi programa.



Ahora , yo ya logre conseguir el hwnd de un listview de esta ventana externa, pero, como seria la forma correcta para copiar sus datos a un listview de mi aplicacion??


Ej: para hacerlo con un listbox ajeno seria segun encontre por alli:


Código:

'Declaración Api SendMessage
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" ( _
    ByVal hwnd As Long, _
    ByVal wMsg As Long, _
    ByVal wParam As Long, _
    lParam As Any) As Long
 
 
' Mensajes y valores  para los listbox
Private Const LB_GETCOUNT As Long = &H18B
Private Const LB_GETTEXTLEN As Long = &H18A
Private Const LB_GETTEXT As Long = &H189


 
 
Private Sub Command1_Click()
 
Dim n_Items As Long
Dim i As Integer
Dim Items As String
Dim El_Item As String
Dim length As Long
 
    'Almacena la cantidad de Items
    n_Items = SendMessage("262583", LB_GETCOUNT, 0, 0)
       
    'Recorre a la cantidad de elementos para obtener los valores
    For i = 0 To n_Items - 1
           
        ' Buffer
        length = SendMessage(262583, LB_GETTEXTLEN, i, 0) '   262583 SERIA EL HWND DEL LITBOX AJENO
           
        El_Item = Space$(length + 1)
           
        ' La variable " el_Item " pasada a SendMessage _
          retorna el dato del Item actual
           
        length = SendMessage(262583, LB_GETTEXT, i, ByVal El_Item)
           
        Items = Items & Replace(El_Item, Chr(0), vbNullString) & vbCrLf
 
    Next i
           
    'Visualiza todos los items del ListBox
    MsgBox Items, vbInformation
 
End Sub
 





Alguiwen sabria adaptar esto a listview??, osea como seria la manera correcta de usar sendmessage con listview en esta operacion?


En línea


Encuentros por Video y Chat !!
Dessa


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Ver Perfil
Re: copiar datos de listview externo con sendmessage ?
« Respuesta #1 en: 10 Febrero 2010, 16:24 pm »

A ver si te sirve este

MODULO

Código:

Option Explicit

Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Private Declare Function VirtualAllocEx Lib "kernel32" (ByVal hProcess As Long, ByVal lpAddress As Long, ByVal dwSize As Long, ByVal flAllocationType As Long, ByVal flProtect As Long) As Long
Private Declare Function VirtualFreeEx Lib "kernel32" (ByVal hProcess As Long, lpAddress As Any, ByVal dwSize As Long, ByVal dwFreeType As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function ReadProcessMemory Lib "kernel32" (ByVal hProcess As Long, lpBaseAddress As Any, lpBuffer As Any, ByVal nSize As Long, lpNumberOfBytesWritten As Long) As Long
Private Declare Function WriteProcessMemory Lib "kernel32" (ByVal hProcess As Long, lpBaseAddress As Any, lpBuffer As Any, ByVal nSize As Long, lpNumberOfBytesWritten As Long) As Long
Private Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long, lpdwProcessId As Long) As Long

Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Public Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Public Declare Function FindWindowEx Lib "user32.dll" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long
Public Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long
Public Declare Function GetParent Lib "user32" (ByVal hwnd As Long) As Long

Private Type LVITEM
  mask As Long
  iItem As Long
  iSubitem As Long
  state As Long
  stateMask As Long
  pszText As Long
  cchTextMax As Long
  iImage As Long
  lParam As Long
  iIndent As Long
End Type

Private Const LVIF_IMAGE = &H2
Private Const LVIF_TEXT = &H1
Private Const LVM_FIRST As Long = &H1000
Private Const LVM_GETITEM As Long = (LVM_FIRST + 5)
Private Const LVM_GETITEMCOUNT = (LVM_FIRST + 4)
Private Const LVM_GETITEMSTATE = (LVM_FIRST + 44)
Private Const LVIS_SELECTED = &H2
Private Const LVM_SETITEMSTATE = (LVM_FIRST + 43)
Private Const LVIF_STATE = &H8&
Private Const PAGE_READWRITE = &H4&
Private Const MEM_RESERVE = &H2000
Private Const MEM_COMMIT = &H1000
Private Const MEM_RELEASE = &H8000
Private Const PROCESS_VM_OPERATION = &H8
Private Const PROCESS_VM_READ = &H10
Private Const PROCESS_VM_WRITE = &H20

Private hWndlvw As Long

Function ListViewGetText(ByVal hwnd As Long, ByVal iSubitem As Integer, ByVal iItem As Integer) As String
    Dim lngProcID As Long, lngProcHandle As Long
    Dim typLvItem As LVITEM, strLvItem As String
    Dim lngVarPtr1 As Long, lngVarPtr2 As Long
    Dim lngMemVar1 As Long, lngMemVar2 As Long
    Dim lngMemLen1 As Long, lngMemLen2 As Long
    Call GetWindowThreadProcessId(hwnd, lngProcID)
    If lngProcID <> 0 Then
        lngProcHandle = OpenProcess(PROCESS_VM_OPERATION Or PROCESS_VM_READ Or PROCESS_VM_WRITE, False, lngProcID)
        If lngProcHandle <> 0 Then
            strLvItem = String(255, vbNullChar)
            lngVarPtr1 = StrPtr(strLvItem)
            lngVarPtr2 = VarPtr(typLvItem)
            lngMemLen1 = LenB(strLvItem)
            lngMemLen2 = LenB(typLvItem)
            lngMemVar1 = VirtualAllocEx(lngProcHandle, 0, lngMemLen1, MEM_RESERVE Or MEM_COMMIT, PAGE_READWRITE)
            lngMemVar2 = VirtualAllocEx(lngProcHandle, 0, lngMemLen2, MEM_RESERVE Or MEM_COMMIT, PAGE_READWRITE)
            With typLvItem
                .cchTextMax = 255
                .iItem = iItem
                .iSubitem = iSubitem
                .mask = LVIF_TEXT
                .pszText = lngMemVar1
            End With
            Call WriteProcessMemory(lngProcHandle, ByVal lngMemVar1, ByVal lngVarPtr1, lngMemLen1, 0)
            Call WriteProcessMemory(lngProcHandle, ByVal lngMemVar2, ByVal lngVarPtr2, lngMemLen2, 0)
            Call SendMessage(hwnd, LVM_GETITEM, ByVal 0, ByVal lngMemVar2)
            Call ReadProcessMemory(lngProcHandle, ByVal lngMemVar1, ByVal lngVarPtr1, lngMemLen1, 0)
            strLvItem = StrConv(strLvItem, vbUnicode)
            strLvItem = Left(strLvItem, InStr(1, strLvItem, vbNullChar) - 1)
            ListViewGetText = strLvItem
            Call VirtualFreeEx(lngProcHandle, ByVal lngMemVar1, lngMemLen1, MEM_RELEASE)
            Call VirtualFreeEx(lngProcHandle, ByVal lngMemVar2, lngMemLen2, MEM_RELEASE)
            Call CloseHandle(lngProcHandle)
        End If
    End If
End Function

Public Function SelectedItem(ByVal hwnd As Long, ItemPos As Long)
    Dim lProcID As Long
    Dim hProc As Long
    Dim lxprocLVITEM As Long
    Dim LV_ITEM As LVITEM
   
    GetWindowThreadProcessId hwnd, lProcID
    If lProcID <> 0 Then
        hProc = OpenProcess(PROCESS_VM_OPERATION Or PROCESS_VM_READ Or PROCESS_VM_WRITE, False, lProcID) ' makwe sure we have read write permissions in the process space
        If hProc <> 0 Then
            lxprocLVITEM = VirtualAllocEx(hProc, 0, LenB(LV_ITEM), MEM_RESERVE Or MEM_COMMIT, PAGE_READWRITE) ' Grab enough memory in the other procedure's space to hold our LV_ITEM
           
                       LV_ITEM.mask = LVIF_STATE
            LV_ITEM.state = True
            LV_ITEM.stateMask = LVIS_SELECTED
           
            WriteProcessMemory hProc, ByVal lxprocLVITEM, ByVal VarPtr(LV_ITEM), LenB(LV_ITEM), 0
           
           
            SendMessage hwnd, LVM_SETITEMSTATE, ItemPos, ByVal lxprocLVITEM
           
            VirtualFreeEx hProc, ByVal lxprocLVITEM, LenB(LV_ITEM), MEM_RELEASE
            CloseHandle hProc
        End If
    End If
End Function

Function GetListViewCount(ByVal hwnd As Long) As Long
  GetListViewCount = SendMessage(hwnd, LVM_GETITEMCOUNT, 0, ByVal 0)
End Function

Function GetItemSelected(hwnd As Long) As Long
  Dim i As Long, Index As Long
  For i = 1 To GetListViewCount(hwnd)
    Index = SendMessage(hwnd, LVM_GETITEMSTATE, i - 1, ByVal LVIS_SELECTED)
      If Index > 0 Then
        GetItemSelected = i
        Exit For
      End If
  Next
End Function




En línea

Adrian Desanti
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