saifatlast
17th June 2011 01:47 UTC

Error 998 Invalid Access Memory Location
'm trying to call the GetCaretPos function in User32.dll from an NSIS installer, and the only thing I can seem to get is an invalid access to memory location error.

Here is my code:

Function fixUpRegKeyText
     Exch $0 ; HWND to text box
     Push $1 ; text of edit box
     Push $2 ; pointer to point structure
     Push $3 ; getlasterror result


     System::Alloc 16 ;struct { long x, long y }
     pop $2
     ;messageBox MB_OK $2
     ;get the caret position
     System::Call "User32::GetCaretPos(p .r2) i.. ? e"
     pop $3

     messageBox MB_OK $3 ; 998!

     ${NSD_GetText} $0 $1

     Push $1
     call StrUpper
     Pop $1

     ${NSD_SetText} $0 $1

     ; now set the caret position
     ;System::call "user32::SetCaretPos(p s.) i .."

     Pop $3
     Pop $2
     Pop $1
     Pop $0
FunctionEnd

Anyone see any problems with what i'm doing here?

Anders
17th June 2011 15:18 UTC

The p pointer type does not work in 2.46, use i. (Use your offline helpfile, the online helpfile has features only available in SVN)

Also, GetCaretPos needs the input, not just output