[RESOLVED] Problem with LVM_GETITEM and 64-bit OS, please help

I use the following code (original post by Bonnie West: https://www.vbforums.com/showthread....Clone-ListView) to get the Item from an external ListView. It works fine on Windows 7 32-bit (Unicode & ANSI), but on 64-bit System there is no return result, if ListView is Unicode (With ListView ANSI it is OK).

I searched for the solution on Google and found it here: https://forum.sources.ru/index.php?showtopic=406899 (by The trick).

However I don't know how to use the NtWow64WriteVirtualMemory64 function for my code.

Can someone please help me with this problem?

Best regards,
FerrMask

is it a 64 bit process or just a 64bit OS?

This one should be working for 64bit OS Im not sure if I ever tried 64bit target process

https://github.com/dzzie/libs/blob/m...icate.bas#L205

also make sure the OpenProcess call is returning success. May have to run as admin

Quote:

---

Originally Posted by dz32

is it a 64 bit process or just a 64bit OS?

This one should be working for 64bit OS Im not sure if I ever tried 64bit target process

https://github.com/dzzie/libs/blob/m...icate.bas#L205

also make sure the OpenProcess call is returning success. May have to run as admin

---

Sorry dz32, I didn't make my problem clear. My code works on 64-bit Systems, however it only retrieves ListView ANSI Items, and ListView Unicode just empty strings.

Thank you very much for sharing.

Best regards,
FerrMask

You need to use 64-bit structures instead 32-bit ones for a 64-bit process:

Code:

---

Private Type HDITEM64
    Mask      As Long
    cxy        As Long
    pszText    As Currency
    hbm        As Currency
    cchTextMax As Long
    fmt        As Long
    lParam    As Currency
    iImage    As Long
    iOrder    As Long
    type      As Long
    lPad      As Long
    pvFilter  As Currency
    state      As Long
End Type

Private Type LVITEM64
    Mask      As Long
    iItem      As Long
    iSubItem  As Long
    state      As Long
    StateMask  As Long
    lPad      As Long
    pszText    As Currency
    cchTextMax As Long
    iImage    As Long
    lParam    As Currency
    iIndent    As Long
    iGroupId  As Long
    cColumns  As Long
    lPad2      As Long
    puColumns  As Currency
    piColFmt  As Currency
    iGroup    As Long
End Type

---

Currency = a pointer. Don't forget to translate Long->Currency, for example:

Code:

---

PutMem4 tHDI.pszText, lngBuffer

---

Quote:

---

Originally Posted by The trick

You need to use 64-bit structures instead 32-bit ones for a 64-bit process...

---

Thanks The trick, I tried using the 64-bit structures, but the result is still the same, besides, the application containing the ListView window is closed when executing the code.

Could you please check the code that I have attached?

Best regards,
FerrMask

You have 2 errors.

Code:

---

PutMem4 tHDI.pszText, ByVal lngBuffer
PutMem4 tLVI.pszText, ByVal lngBuffer

---

Code:

---

ReadProcessMemory(lngProcess, lngBuffer, ByVal StrPtr(strColumns(lngCol)), tHDI.cchTextMax - 2, lngRet)
ReadProcessMemory(lngProcess, lngBuffer, ByVal StrPtr(strItems(lngRow, lngCol)), tLVI.cchTextMax - 2, lngRet)

---

Quote:

---

Originally Posted by The trick

You have 2 errors...

---

Problem solved.
Thanks for the help!

Best regards,
FerrMask