Título: copiar datos de listview externo con sendmessage ?
Publicado por: Tengu 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:
'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?
Título: Re: copiar datos de listview externo con sendmessage ?
Publicado por: Dessa en 10 Febrero 2010, 16:24 pm
A ver si te sirve este MODULO
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
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