NSIS macros for checking and enabling Windows Features

WindowsFeature.nsh

; Check if Windows Feature needs to be enabled (e.g., .NET 3.5 on Windows 10+)
!define CheckWindowsFeature `!insertmacro _CheckWindowsFeature`
!macro _CheckWindowsFeature _FEATURE _RESULT
	Push $0
	Push $1
	Push $R8
	
	StrCpy ${_RESULT} "unknown"
	
	; Use DISM to check Windows feature status
	ExecWait 'dism /online /get-featureinfo /featurename:"${_FEATURE}"' $0
	${Switch} $0
		${Case} "0"
			; Feature command succeeded, need to parse output
			StrCpy ${_RESULT} "available"
			${Break}
		${Case} "87"
			; Feature not found
			StrCpy ${_RESULT} "not_available"
			${Break}
		${Default}
			; Other error
			StrCpy ${_RESULT} "error"
			${Break}
	${EndSwitch}
	
	Pop $R8
	Pop $1
	Pop $0
!macroend

; Enable Windows Feature
!define EnableWindowsFeature `!insertmacro _EnableWindowsFeature`
!macro _EnableWindowsFeature _FEATURE _RESULT _ERROR
	Push $0
	Push $1
	
	StrCpy ${_RESULT} "false"
	StrCpy ${_ERROR} ""
	
	${DebugMsg} "Enabling Windows feature: ${_FEATURE}"
	ExecWait 'dism /online /enable-feature /featurename:"${_FEATURE}" /all /norestart' $0
	
	${Switch} $0
		${Case} "0"
			StrCpy ${_RESULT} "true"
			${DebugMsg} "Windows feature enabled successfully: ${_FEATURE}"
			${Break}
		${Case} "3010"
			StrCpy ${_RESULT} "true"
			StrCpy ${_ERROR} "Feature enabled, restart required"
			${DebugMsg} "Windows feature enabled, restart required: ${_FEATURE}"
			${Break}
		${Default}
			StrCpy ${_ERROR} "Failed to enable feature, error code: $0"
			${DebugMsg} "Failed to enable Windows feature ${_FEATURE}: $0"
			${Break}
	${EndSwitch}
	
	Pop $1
	Pop $0
!macroend