Link who opens a text file

Hi,
I've created a custom page. Now I would add a function:

At the bottom is a link "Hier". Is it possible when the user clicks on "Hier" that a text file e.g. "$INSTDIR\Infos\Textfile.txt" opens?

Thanks for your help.
- Marc

Here is a screenshot:

Type=Link
........
........
Text=Open Read me
State=<full_path_to_file>\file.txt

Oh very easy 🙂

THANKS

Edit:
One question: When I choose the path: C:\... it works perfect but when I use State=$INSTDIR\Infos\Tasten.txt it doesn't work.

Is there a way that it works?

You may add constants though the directory must exists, you're receiving this error because the $INSTDIR yet is not created since your section would be executed later on InstFiles page 🙂

I thought this to but this is my sequence:

!insertmacro MUI_PAGE_DIRECTORY
!insertmacro MUI_PAGE_INSTFILES
Page custom ConfigPage PageLeaveConfig
...

The ConfigPage is the page with the link. So it should work?

Have you an idea what I could trying?

Let's make it clear, if the $INSTDIR is created and all files are in tact, you need to add this line to the custom ini within the ConfigPage function e.g.
Function ConfigPage
WriteINIStr "$PLUGINSDIR\<ini_file_name>" "field #" "State" "$INSTDIR\Infos\Tasten.txt"

..............
..............
..............
FunctioEnd

Thanks Red Wine for your help. I've make it now like you've said.

This is the ConfigPage Function Code:

Function ConfigPage
!insertmacro SectionFlagIsSet ${SectionConfig} ${SF_SELECTED} ShowPage SkipPage
ShowPage:

GetDlgItem $R0 $HWNDPARENT 2
EnableWindow $R0 0|1 # 0=hide, 1=show
GetDlgItem $R0 $HWNDPARENT 3
EnableWindow $R0 0|1 # 0=hide, 1=show
!insertmacro MUI_HEADER_TEXT "Konfiguration des Erweiterungs System" "Legen Sie die Tasten für die Config fest."
!insertmacro MUI_INSTALLOPTIONS_DISPLAY "config.ini"

WriteINIStr "$PLUGINSDIR\config.ini" "field 9" "State" "$INSTDIR\Infos\Tasten.txt"

SkipPage:

FunctionEnd

This is the Code from the link in the config.ini:

[Field 9]
Type=Link
Text=Hier
Left=28
Right=42
Top=118
Bottom=126
TxtColor=0x0080FF
State=$INSTDIR\Infos\Tasten.txt

Is this right so? Unfotunately it doesn't work.

Can you say me what's wrong?
Thank you!!

The wrong is that you first display the page then write to ini.

WriteINIStr "$PLUGINSDIR\config.ini" "field 9" "State" "$INSTDIR\Infos\Tasten.txt"

!insertmacro MUI_INSTALLOPTIONS_DISPLAY "config.ini"

COOL THANKS 🙂

Works perfect now!!