Delphi: Using TextHint in a multiline text component such as TMemo or TRichEdit

Question

TextHint is the TEdit property which let's you display a greyed text hint inside the textbox, when the textbox is empty.

I want to place the same kind of hint in a TMemo, or TRichEdit, since the TEdit component does not allow multiline.

How can I use a TextHint inside a multiline text control in Delphi? The TextHint property actually exists in TMemo and TrichEdit components, but it seems to have no effect.

Thank you in advance.

Answer 1

The TextHint property is implemented using the EM_SETCUEBANNER message. Windows itself simply does not support that message on those UI controls:

You cannot set a cue banner on a multiline edit control or on a rich edit control.