Customizing Wix_Advanced Dialog Set UI Sequence

[takase1121]

Hi, I am working on a Wix v4 project (MSI), and I am having some difficulties with customizing Wix_Advanced.
My goal is to hide the EULA (replace AdvancedWelcomeEulaDlg with WelcomeDlg, and then directly go to InstallScopeDlg).

In case I haven't made myself clear, this is my very first time using WiX and I really have no idea what I'm doing. Most of the documenentation are for v3, which are sometimes not compatible. I try to scourge as much information from the issue tracker and examples online and piece everything together. This is my current .wxs file:

Code

<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs"
	 xmlns:ui="http://wixtoolset.org/schemas/v4/wxs/ui">
	<Package Name="Lite XL" Manufacturer="Lite XL Team" Version="1.0.0.0" UpgradeCode="8c17acad-1a2c-4a7f-9000-746d9175e91e">
		<MajorUpgrade DowngradeErrorMessage="!(loc.DowngradeError)" />
		<MediaTemplate EmbedCab="yes"/>

		
		<ui:WixUI Id="WixUI_Advanced"/>
		<!-- fix WixUI_Advanced asking for admin privilege when doing per-user install
			https://github.com/wixtoolset/issues/issues/5481#issuecomment-493122001 -->
		
		<Property Id="WIXUI_EXITDIALOGOPTIONALCHECKBOXTEXT" Value="Launch Lite XL" />
		<CustomAction Id="LaunchApplication" FileRef="File_lite_xl_lite_xl_exe" ExeCommand="" Return="asyncNoWait"/>
			
		<UI>
			<!-- workaround peruser install requiring admin privileges -->
			<Publish Dialog="InstallScopeDlg" Control="Next" Property="MSIINSTALLPERUSER" Value="1" Order="3" Condition="WixAppFolder = &quot;WixPerUserFolder&quot;"/>
			<Publish Dialog="InstallScopeDlg" Control="Next" Property="MSIINSTALLPERUSER" Value="{}" Order="2" Condition="WixAppFolder = &quot;WixPerMachineFolder&quot;"/>
			<Publish Dialog="InstallScopeDlg" Control="Next" Event="DoAction" Value="WixSetDefaultPerMachineFolder" Order="3" Condition="WixAppFolder = &quot;WixPerMachineFolder&quot;"/>
			<Publish Dialog="InstallScopeDlg" Control="Next" Event="DoAction" Value="WixSetDefaultPerUserFolder" Order="3" Condition="WixAppFolder = &quot;WixPerUserFolder&quot;"/>
			
			<Publish Dialog="ExitDialog" Control="Finish" Event="DoAction" Value="LaunchApplication" Condition="WIXUI_EXITDIALOGOPTIONALCHECKBOX = 1 and NOT Installed"/>
		</UI>
		
		<Property Id="ApplicationFolderName" Value="Lite XL" />
		<Property Id="WixAppFolder" Value="WixPerMachineFolder" />

		<!-- Directories -->
		<StandardDirectory Id="ProgramFilesFolder">
			<Directory Id="APPLICATIONFOLDER"/>
		</StandardDirectory>
		
		<StandardDirectory Id="ProgramMenuFolder">
			<Component Id="ApplicationStartMenuShortcut"
			   Guid="{7c1b0a3a-0c11-4504-ac07-31be2ff1afe1}">
				<Shortcut Id="LiteXLStartMenuShortcut"
						  Name="Lite XL"
						  Description="Fast, Lightweight and Powerful Text-Editing Experience"
						  Target="[APPLICATIONFOLDER]\lite-xl.exe"
						  WorkingDirectory="APPLICATIONFOLDER"/>
				<RegistryValue Root="HKMU" Key="Software\Lite XL" Name="Installed" Value="1" KeyPath="yes"/>
			</Component>
		</StandardDirectory>

		<StandardDirectory Id="DesktopFolder">
			<Component Id="ApplicationDesktopShortcut"
			   Guid="{c9400be4-fe2f-4212-84c0-e8f21699205a}">
				<Shortcut Id="LiteXLDesktopShortcut"
						  Name="Lite XL"
						  Description="Fast, Lightweight and Powerful Text-Editing Experience"
						  Target="[APPLICATIONFOLDER]\lite-xl.exe"
						  WorkingDirectory="APPLICATIONFOLDER"/>
				<RegistryValue Root="HKMU" Key="Software\Lite XL" Name="Installed" Value="1" KeyPath="yes"/>
			</Component>
		</StandardDirectory>

		<Feature Id="Main"
				 Title="Lite XL"
				 Description="The editor itself."
				 AllowAbsent="no"
				 Level="1">
			<ComponentGroupRef Id="MainComponent" />

		</Feature>

		<Feature Id="AddToPath"
				 Title="Add to PATH"
				 Description="Adds Lite XL to PATH, allowing you to launch it from the terminal."
				 Level="1000">
			<Component Id="SetPathUser"
					   Guid="{d8ce2f1a-ac14-49ea-bc71-dddf509222df}"
					   Directory="APPLICATIONFOLDER"
					   Condition="WixAppFolder = &quot;WixPerUserFolder&quot;">
				<Environment Id="SetUserPathEnv"
							 Action="set"
							 Name="PATH"
							 Value="[APPLICATIONFOLDER]"
							 Permanent="yes"
							 Part="last"/>
			</Component>
			<Component Id="SetPathMachine"
					   Guid="{dff171c9-baf3-413f-b332-9b8ed3839a66}"
					   Directory="APPLICATIONFOLDER"
					   Condition="WixAppFolder = &quot;WixPerMachineFolder&quot;">
				<Environment Id="SetMachinePathEnv"
							 Action="set"
							 Name="PATH"
							 Value="[APPLICATIONFOLDER]"
							 Permanent="yes"
							 Part="last"
							 System="yes"/>
			</Component>
		</Feature>

		<Feature Id="StartMenuShortcut"
				 Title="Add Lite XL to Start Menu"
				 Description="Allows you to launch Lite XL from the Start Menu"
				 Level="3">
			<ComponentRef Id="ApplicationStartMenuShortcut"/>
		</Feature>

		<Feature Id="DesktopShortcut"
				 Title="Add Lite XL to Desktop"
				 Description="Allows you to launch Lite XL from the Desktop"
				 Level="3">
			<ComponentRef Id="ApplicationDesktopShortcut"/>
		</Feature>
	</Package>
</Wix>

To try to extend this UI, I tried the instructions here but it was for V3 and it doesn't work.
I wasn't able to access WixUIValidatePath. I've read that this action is now architecture-dependent and needs the <ui:WixUI> namespace to import properly.

I imported WixUI_Advanced with the <ui:WixUI> tag but was unable to replace AdvancedWelcomeEulaDlg with WelcomeDlg. I tried adding this after the <UI> declaration:

<InstallUISequence>
            <Show Dialog="WelcomeDlg" Before="ProgressDlg" Condition="NOT Installed OR PATCH" />
</InstallUISequence>

Which did not work because WixUI_Advanced doesn't allow overriding this. I'm unsure how to achieve this.