When I have a TeeGrid on a Form, and I have a StyleBook applied to this form, the form shows styled, but the grid remains "white". If I open the TeeGrid Editor, I can select "Default" in the Theme tab, and things appear good at design time, however, if I run the grid is white again. Any editors assi...

I found the solution myself, you should always call Data := TStringsData.Create; this should not depend on if Data = nil. I thought this would give a memory leak, but this is handled by the Grid properly.

Did I miss this in the documentation?

I have a TeeGrid that displays (string) data which can be updated. The data and the number of columns and rows will be updated. This is what the function looks like that populates the grid: procedure TMainForm.FillGrid; begin if Data = nil then Data := TStringsData.Create; // Fill Header for i := 0 ...