NSIS：StateChanged上的自定义页面

Question

I have a some different license pages with check box on it. The Next button should be disabled if check box is unchecked. Is there an event that I can use if checkbox state changed? Here is my code of one of this

var Window
var labelDescription
var checkBoxIsUserAgree

Function CreateCustomLicense1
  nsDialogs::Create 1018
  Pop $Window

  GetDlgItem $0 $HWNDPARENT
  EnableWindow $0 0
  ${NSD_CreateLabel} 13u 22u 270u 96u "Description"
  Pop $labelDescription
  ${NSD_CreateCheckBox} 10u 110u 100u 15u "I Agree"
  $checkBoxIsUserAgree
FunctionEnd

Function ShowCustomLicence1
  Call CreateCustomLicense1
  nsDialogs::Show
Function

Function .oncheckBoxIsUserAgreeStateChanged ; what event I can use for track checkbox state changing
 EnableWindow $0 1
FunctionEnd

Answer 1

The built-in NSIS license page supports a checkbox and can be used multiple times but if you insist on creating a custom page you just have to add a on* handler:

!include nsDialogs.nsh

Var checkBoxIsUserAgree

Function ShowCustomLicence1
  nsDialogs::Create 1018
  Pop $1

  GetDlgItem $0 $HWNDPARENT 1
  EnableWindow $0 0
  ${NSD_CreateLabel} 13u 22u 270u 90u "Description"
  Pop $1
  ${NSD_CreateCheckBox} 10u 110u 100u 15u "I Agree"
  Pop $checkBoxIsUserAgree
  ${NSD_OnClick} $checkBoxIsUserAgree oncheckBoxIsUserAgreeStateChanged1

  nsDialogs::Show
FunctionEnd


Function oncheckBoxIsUserAgreeStateChanged1
  Pop $1 ; Throw away parameter
  ${NSD_GetState} $checkBoxIsUserAgree $1
  EnableWindow $0 $1
FunctionEnd

Page Custom ShowCustomLicence1
Page InstFiles