Hi Adrian,
Thank you for contacting Syncfusion Support.
We have checked your query "I want to add a userform to a tile" and we have prepared the sample for TileViewItem to hold WPF UserControl and WindowsForms UserControl. In this sample left side TileView contains WindowsForms UserControl and right side TileView contains WPF UserControl. If we add WindowsForms UserControl as TileViewItem content, we have some limitations on minimized and maximized the TileViewItem WPF animation are not updated properly for WindowsForms control due to Hosting Windows Forms control inside WPF. Please find the sample from the following link.
Sample:
TileViewControl_UserFormIf, you have any other concerns regarding this please let us know. It would be helpful to proceed further.
Regards,
Marimuthu S.