How to change color of textbox on custom page?

Hello,

is it possible to change the background color of a textbox on a custom page from grey to white?
Here is my ini-File:

[Settings]
NumFields=3
State=0
[Field 1]
Type=Label
Left=0
Top=100
Right=-1
Bottom=120
Text=
State=0
Flags=NOTIFY
HWND=1967168
[Field 2]
Type=text
Left=0
Top=10
Right=-1
Bottom=90
Text=
State=""
Flags=MULTILINE|VSCROLL|READONLY
HWND=4719720
[Field 3]
Type=Checkbox
Left=0
Top=125
Right=-1
Bottom=135
Text=Ignore
State=1
Flags=NOTIFY
HWND=1508582 

and here is my code of showCustomPage:

Function showCheckSummary
 !insertmacro MUI_HEADER_TEXT "Environment errors" "The following environment checks failed."
 
 ;if no errors were found go to done else goto notEqual
 strcmp $9 "false" done notEqual
 notEqual:
  writeinistr "checkSummary.ini" "FIELD 3" "State" "0"
  ;disable next button
  GetDlgItem $R0 $HWNDPARENT 1
  EnableWindow $R0 0
  writeinistr "checkSummary.ini" "FIELD 2" "State" "$ERROR_MESSAGE"
  ;changeColor of textbox from grey to white
  ReadINIStr "$0" "checkSummary.ini" "FIELD 2" "HWND"
  strcpy $0 "4719720"
  GetDlgItem $0 $HWNDPARENT 1
  SetCtlColors $0 0xFF00FF 0x00FFFF
  InstallOptions::InitDialog /NOUNLOAD "checkSummary.ini"
  InstallOptions::Show 'checksummary.ini'
 done:
 
FunctionEnd 

I tried it but somethong goes wrong...
Where is the mistake?

Thanks...

ReadINIStr "$0" "checkSummary.ini" "FIELD 2" "HWND"
SetCtlColors $0 0xFF00FF 0x00FFFF

-Stu

hm,
ok I tried it, but it does not work.
I pasted the two lines before

InstallOptions::InitDialog /NOUNLOAD "checkSummary.ini" 

and deleted the others but the textbox is still grey...
ReadIniString returns the correct value.

add the code between the 2 plugin calls e.g.

  InstallOptions::InitDialog /NOUNLOAD "checkSummary.ini"



ReadINIStr "$0" "checkSummary.ini" "FIELD 2" "HWND"

SetCtlColors $0 0xFF00FF 0x00FFFF



  InstallOptions::Show 'checksummary.ini'

and use either the mui macro system to read/write the ini and call the plugin, or you need to type "$PLUGINSDIR\checkSummary.ini" every time.