app crash when dllcall CallWindowProc

[fenhanxue]

here's my code:

#AutoIt3Wrapper_UseX64 = n
_Base64Encode('test')

Func _Base64Encode($Data, $LineBreak = 76)

        Local $Opcode = "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
        Local $CodeBuffer = DllStructCreate("byte[" & BinaryLen($Opcode) & "]")
        DllStructSetData($CodeBuffer, 1, $Opcode)
        $Data = Binary($Data)
        Local $Input = DllStructCreate("byte[" & BinaryLen($Data) & "]")
        DllStructSetData($Input, 1, $Data)
        $LineBreak = Floor($LineBreak / 4) * 4
        Local $OputputSize = Ceiling(BinaryLen($Data) * 4 / 3)
        $OputputSize = $OputputSize + Ceiling($OputputSize / $LineBreak) * 2 + 4
        Local $Ouput = DllStructCreate("char[" & $OputputSize & "]")
        
        
      DllCall("user32.dll", "none", "CallWindowProc", "ptr", DllStructGetPtr($CodeBuffer), _
                "ptr", DllStructGetPtr($Input), _
                "int", BinaryLen($Data), _
                "ptr", DllStructGetPtr($Ouput), _
                "uint", $LineBreak)
                
                
        Return DllStructGetData($Ouput, 1)

EndFunc   ;==>_Base64Encode

 I  find  the code can not go through  this line:

DllCall("user32.dll", "none", "CallWindowProc", "ptr", DllStructGetPtr($CodeBuffer), _
                "ptr", DllStructGetPtr($Input), _
                "int", BinaryLen($Data), _
                "ptr", DllStructGetPtr($Ouput), _
                "uint", $LineBreak)

Can anyone help me ?

Edited April 10, 2018 by fenhanxue

[Earthshine]

what is this for? could you be less vague with the details? 

Edited April 9, 2018 by Earthshine

[funkey]

Don't know, but I think you should start your script as x86 not as x64 application

[fenhanxue]

8 hours ago, Earthshine said:

what is this for? could you be less vague with the details? 

DllCall("user32.dll", "none", "CallWindowProc", "ptr", DllStructGetPtr($CodeBuffer), _
                "ptr", DllStructGetPtr($Input), _
                "int", BinaryLen($Data), _
                "ptr", DllStructGetPtr($Ouput), _
                "uint", $LineBreak)

not all the computers can this code works in.     forgive me  my  poor  english   ,   the iss is about  "CallWindowProc" 

in some of my friends cumputers , the code can work

but  in my computer, when the code cames to this line ,it  accurs app crash.

 

[trancexx]

The code to run should be marked as executable code. On modern systems you can't just run random bytes. Search for VirtualProtect and PAGE_EXECUTE.

On top of that CallWindowProc is old way of running code, check DllCallAddress.