Refreshing MUI InstallOptions page after NOTIFY control used

Heres my situation: I have a custom InstallOptions page with NOTIFY controls, which execute correctly when clicked or manipulated in the compiled installer, but the page doesnt refresh! I have to press "back" then "next" to see the changes that were made.
Heres my custom page code:

code:
Function ShowFileOptions

    ${If} $ShowLiscense = 0

        !insertmacro MUI_INSTALLOPTIONS_WRITE "FileOptions.ini" "Settings" "NextButtonText" "Finish"

    ${Else}

        !insertmacro MUI_INSTALLOPTIONS_WRITE "FileOptions.ini" "Settings" "NextButtonText" "Continue >"

    ${EndIf}

    

    !insertmacro MUI_HEADER_TEXT "$(TEXT_IO_TITLE)" "$(TEXT_IO_SUBTITLE)"   

    !insertmacro MUI_INSTALLOPTIONS_INITDIALOG "FileOptions.ini"

    Pop $HWND

    !insertmacro MUI_INSTALLOPTIONS_SHOW

FunctionEnd



Function LeaveFileOptions

    !insertmacro MUI_INSTALLOPTIONS_READ $R0 "FileOptions.ini" "Settings" "State"

    StrCmp $R0 0 Done

    StrCmp $R0 7 AddBtn

    StrCmp $R0 10 EditBtn

    Abort

    

    AddBtn:

        !insertmacro MUI_INSTALLOPTIONS_READ $R1 "FileOptions.ini" "Field 3" "State"

        !insertmacro SMIS_APPEND "$R1" "FileOptions.ini" "Field 5"

        Abort

    

    EditBtn:

        !insertmacro MUI_INSTALLOPTIONS_WRITE "FileOptions.ini" "Field 6" "Flags" "DISABLED"

        Abort

    

    Done:

FunctionEnd

[Afrow UK]

You can't do it that way because the InstallOptions page is in memory and no longer read from the INI file.
You must manipulate the dialog in memory with GetDlgItem and SendMessage etc

You already have the code ready to use $HWND in your leave function.

-Stu

[AnarkiNet]

Is there any more extensive documentation of the SendMessage and related commands? the NSIS help files that come with dont list any of the message numbers and barely glaze over what the function does.

[Afrow UK]

Try this example InstallOptions script:
http://nsis.sourceforge.net/mediawik...6/IoColors.zip

-Stu