Wabiloo
12th September 2006 16:17 UTC

SendMessage and SetCtlColors... text overlaying
  I don't understand this one.
On a custom page, I have a field (Field 8) that is there for me to throw warning messages. A number of radio buttons are on the page as well, and when the user select an option, sometimes he needs to be given a warning. If he then changes the selection for a safe option, the warning disappears
To make it visible, I set that field to a red color.

    !macro WarnExists _WILLERASE

       !insertmacro MUI_INSTALLOPTIONS_READ $1 "ComposerDatabase.ini" "Field 8" "HWND"

       SetCtlColors $1 /BRANDING "FF0000" 

       ${If} $dbExists = 1 

       ${AndIf} ${_WILLERASE} = 1

            SendMessage$1 ${WM_SETTEXT} 0 "STR:A database file already exists. Selecting this option will overwrite it completely."

        ${Else}  

            ;SetCtlColors $1 000000 transparent

            SendMessage$1 ${WM_SETTEXT} 0 "STR:Safe option"

        ${EndIf}

    !macroend


>Function CustomPageLeave


   !insertmacro MUI_INSTALLOPTIONS_READ $0 "ComposerDatabase.ini" "Settings" "State"


   StrCmp $0 0 end

    

   ; $dbExists (global variable) contains 1 or 0

   !insertmacro WarnExists $dbExists

    Abort


    end:


>FunctionEnd 

>

However, what happens is that if the user selects an unsafe option, the correct message appears, but if he then selects another one (safe), the message does not disappear, and the "Safe option" message is showing *above* the other one...

Funnily enough, if I decide to have the messages in black (by not using the SetCtlColors", then everything is as it should be...

I've tried all sorts of things, like resetting the color to black first, send an empty message, send blank spaces... nothing works.

Any idea?

Afrow UK
12th September 2006 17:29 UTC

Try refreshing the label by hiding it and showing it again with ShowWindow (SW_HIDE, SW_SHOW).

-Stu