How to set the checkbox by default checked in the windows installer Finish page using NSIS - nsis

Question

I wanted to set the checkbox as checked by default in the windows installer Finish page using NSIS. For that I used the below code snipped. But it is not even displaying the checkbox in the Finish page. Please help me on this.
Var Checkbox
Var CheckState ; Stored globally so we remember the choice if the user presses the back button and goes back to our page
!define CheckHeight 28
!macro CreateNativeControl hParent cls style exstyle x y w h text ; Note: Only supports pixel coordinates
System::Call 'USER32::CreateWindowEx(i ${exstyle}, t "${cls}", ts, i ${style}, i ${x}, i ${y}, i ${w}, i ${h}, p ${hParent}, i0, i0, i0)p.s' "${text}"
!macroend
!define MUI_PAGE_CUSTOMFUNCTION_SHOW FinishShow
!insertmacro MUI_PAGE_FINISH
Function FinishShow
System::Call *(i,i,i,i)p.r0 ; NSIS 2.51+
System::Call 'USER32::GetWindowRect(p$mui.FinishPage.Text, pr0)'
System::Call 'USER32::MapWindowPoints(i0,p$mui.FinishPage,p$0,i2)'
System::Call '*$0(i.r2,i.r3,i.r4,i.r5)'
System::Free $0
IntOp $5 $5 - ${CheckHeight}
System::Call 'USER32::SetWindowPos(i$mui.FinishPage.Text,i,i,i,i$4,i$5,i0x6)'
; Create and initialize the checkbox
IntOp $5 $3 + $5 ; y = TextTop + TextHeight
!insertmacro CreateNativeControl $mui.FinishPage ${__NSD_CheckBox_CLASS} "${__NSD_CheckBox_STYLE}" "${__NSD_CheckBox_EXSTYLE}" 0 $5 300 ${CheckHeight} "CheckboxTest"
Pop $Checkbox
SendMessage $mui.FinishPage ${WM_GETFONT} 0 0 $0
SendMessage $Checkbox ${WM_SETFONT} $0 1
System::Call 'USER32::SetWindowPos(i$Checkbox,i0,i,i,i,i,i0x33)'
${IfThen} $CheckState == "" ${|} StrCpy $CheckState 1 ${|}
${NSD_SetState} $Checkbox $CheckState
FunctionEnd

Answer 1

The finish page has built-in support for two optional check-boxes:
!include MUI2.nsh
!insertmacro MUI_PAGE_WELCOME
!insertmacro MUI_PAGE_INSTFILES
!define MUI_FINISHPAGE_RUN ""
!define MUI_FINISHPAGE_RUN_TEXT "Run Foo"
!define MUI_FINISHPAGE_RUN_FUNCTION MyRunFoo
;define MUI_FINISHPAGE_RUN_NOTCHECKED
!define MUI_FINISHPAGE_SHOWREADME "$InstDir\Bar.exe"
!define MUI_FINISHPAGE_SHOWREADME_TEXT "Run Bar"
;define MUI_FINISHPAGE_SHOWREADME_FUNCTION
!define MUI_FINISHPAGE_SHOWREADME_NOTCHECKED
!insertmacro MUI_PAGE_FINISH
!insertmacro MUI_LANGUAGE English
Function MyRunFoo
; Exec '"$InstDir\Foo.exe"'
FunctionEnd
Section
SectionEnd
Your example code is also missing a important call to !insertmacro MUI_LANGUAGE.
The function specified by MUI_FINISHPAGE_RUN_FUNCTION is only executed if the checkbox is checked. This is normal expected behavior.
If you want to do custom handling you can do it in the leave page:
!include nsDialogs.nsh
!include LogicLib.nsh
!include MUI2.nsh
!insertmacro MUI_PAGE_WELCOME
!insertmacro MUI_PAGE_INSTFILES
!define MUI_FINISHPAGE_RUN ""
!define MUI_FINISHPAGE_RUN_TEXT "Blah blah"
!define MUI_PAGE_CUSTOMFUNCTION_LEAVE FinishLeave
!insertmacro MUI_PAGE_FINISH
!insertmacro MUI_LANGUAGE English
Function FinishLeave
${NSD_GetState} $mui.FinishPage.Run $0 ; or $mui.FinishPage.ShowReadme
${If} $0 <> 0
MessageBox mb_ok "Checkbox checked"
${Else}
MessageBox mb_ok "Checkbox not checked"
${EndIf}
FunctionEnd