Author: Tomas Rutkauskas
How to specify a different width for the items list in a TComboBox
Answer:
Send it the CB_SETDROPPEDWIDTH message with a new width.
1 2 procedure TForm1.Button1Click(Sender: TObject);
3 var4 W: integer;
5 begin6 W := 300;
7 SendMessage(ComboBox1.Handle, CB_SETDROPPEDWIDTH, W, 0);
8 end;