From Xojo Documentation
Supported PlatformsProject Types: Web Platforms: macOS, Windows, Linux
New in 2010r4
This control can be used to add your own HTML to a WebPage before the page is sent to the client.
WebPageSource cannot be used with a WebDialog or WebContainer. It is for use with WebPage classes only. The IDE does not currently enforce this but it will eventually.
Assign a constant to the Location property to specify the location at which the HTML will be inserted.
|LocationBeforeContent||The Source will be inserted into the page body just before the controls.|
|LocationAfterContent||The Source will be inserted into the page body just after the controls.|
Please use WebApplication.HTMLHeader property if you need to add something to the headers.