DllCall to CreateFileMapping

[Squeeto]

Hi,

I can't seem to get this to work past the CreateFileMapping call.

Can anyone see any obvious error?

expandcollapse popup

#include <GUIConstants.au3>

$main = GUICreate("Test1", 180, 120)
  $testButton = GUICtrlCreateButton("", 50, 30, 35, 25, $BS_DEFPUSHBUTTON)
GUISetState(@SW_SHOW)

While 1
  $msg = GUIGetMsg()
  Select
    Case $msg = $GUI_EVENT_CLOSE
      Exit
    Case $msg = $testButton
      $fileName = @ScriptDir & "\some.exe"
      ExitLoop
  EndSelect
WEnd

const $PAGE_READONLY = 2 
const $FILE_MAP_READ = 4
$hDll = DllOpen("kernel32.dll")
If $hDll <> -1 Then
  $hFile = DllCall($hDll, "hwnd", "CreateFile", _
    "str", $fileName, _
    "dword", $GENERIC_READ, _
    "dword", $FILE_SHARE_READ, _
    "dword", "", _
    "dword", $OPEN_EXISTING, _
    "dword", $FILE_ATTRIBUTE_NORMAL, _
    "hwnd", 0)
  If Not @error Then
    MsgBox(0, "Testing", $hFile[0])
    $hFileMapping = DllCall($hDll, "hwnd", "CreateFileMapping", _
      "hwnd", $hFile, _
      "dword", "", _
      "dword", $PAGE_READONLY, _
      "dword", 0, _
      "dword", 0, _
      "str", "")
    If Not @error Then
      MsgBox(0, "Testing", $hFileMapping[0])
      $pBaseAddress = DllCall($hDll, "hwnd", "MapViewOfFile", _
        "hwnd", $hFileMapping, _
        "dword", $FILE_MAP_READ, _
        "dword", 0, _
        "dword", 0, _
        "uint", 0)
      If Not @error Then
        MsgBox(0, "Testing", $pBaseAddress[0])
      Else
        MsgBox(16, "Error", "Error retreaving base address.")
      EndIf
    Else
      MsgBox(16, "Error", "Error creating file mapping.")
    EndIf
  Else
    MsgBox(16, "Error", "Error retreaving file.")
  EndIf
  DllClose($hDll)
Else
  MsgBox(16, "Error", "Error opening Dll")
EndIf

Exit

Thank you

[rover]

squeeto

at a glance, you used dllcall return as a var and not an array element

MsgBox(0, "Testing", $hFile[0])
    $hFileMapping = DllCall($hDll, "hwnd", "CreateFileMapping", _
        "hwnd", $hFile[0], _
      
    MsgBox(0, "Testing", $hFileMapping[0])
    $pBaseAddress = DllCall($hDll, "hwnd", "MapViewOfFile", _
        "hwnd", $hFileMapping[0], _

Cheers

[Squeeto]

That fixed it.

Thank you Rover.