Load Textbox with contents of a textfile in InstallOptions

I have searched high and low for an example of this but I think there really is no exmple of this.

Here is the code I have written to do it, and it has a flaw - it seems only the first 1024 characters get sent to the text/edit control:

Function EULAPage



  !insertmacro MUI_INSTALLOPTIONS_EXTRACT "${MY_FORM}"

  !insertmacro MUI_HEADER_TEXT "[Software] Optional Installation" "Installing this option provides ..."

  # Alter the ini file before displaying

  WriteINIStr $PLUGINSDIR\${MY_FORM} "Field 4" "Text" $PLUGINSDIR\${MY_IMAGE}  

  !insertmacro MUI_INSTALLOPTIONS_INITDIALOG "${MY_FORM}"

  

  Loop:

  IntOp $R1 $R1 + 1

  ${LineRead} "newEULA.txt" $R1 $0

  StrCpy $1 "$1$0"

  IfErrors Done Loop

  Done:

  

  !insertmacro MUI_INSTALLOPTIONS_READ $R0 "${MY_FORM}" "Field 6" "HWND"

  SendMessage $R0 ${WM_SETTEXT} 0 "STR:$1"

  

  !insertmacro MUI_INSTALLOPTIONS_SHOW  

FunctionEnd

How do I read the entire contents of a text file and send that to a readonly scrollable textbox on a custom form?

That was right on the money, perfect help. Thanks!

Minor tweaking of the code:

Function MyPage



  !insertmacro MUI_INSTALLOPTIONS_EXTRACT "${MY_FORM}"

  !insertmacro MUI_HEADER_TEXT "[Software] Optional Installation" "Installing this option provides ..."

  # Alter the ini file before displaying

  WriteINIStr $PLUGINSDIR\${MY_FORM} "Field 4" "Text" $PLUGINSDIR\${MY_IMAGE}  

  !insertmacro MUI_INSTALLOPTIONS_INITDIALOG "${MY_FORM}"



  !insertmacro MUI_INSTALLOPTIONS_READ $9 "${MY_FORM}" "Field 6" "HWND"

  

  System::Call 'kernel32::CreateFile(t "$PLUGINSDIR\${LIC_NAME}", i ${GENERIC_READ}, i ${FILE_SHARE_READ}, i 0, i ${OPEN_EXISTING}, i 0, i 0) i .r0'

  IfErrors exit

  System::Call 'kernel32::GetFileSize(i r0, i 0) i .r1'

  IntOp $1 $1 + 1 ; for terminating zero

  System::Alloc $1

  Pop $2

  System::Call 'kernel32::ReadFile(i r0, i r2, i r1, *i .r3, i 0)'

  System::Call 'kernel32::CloseHandle(i r0)'

  SendMessage $9 ${WM_SETTEXT} $9 $2

  System::Free $2

  exit:

  

  !insertmacro MUI_INSTALLOPTIONS_SHOW  

FunctionEnd

Works on Vista too!