Author: Tomas Rutkauskas

The goal is to insert a string into the text in a TComboBox at the last cursor 
position. An assignment like edInput.SelText := newText; works fine with a TEdit 
when AutoSelect = false, but not with combobox. SelStart always returns 0 after 
exiting. So no matter where the user had the cursor, the text is always inserted at 
the front. Is there a quick workaround for this?

Answer:

Assign the Combobox.selstart value to a variable on the KeyUp event of the combobox 
and call the variable when you need the position. You can take the hint as a 
variable or declare your own variable.
1   
2   procedure TForm1.ComboBox1KeyUp(Sender: TObject; var Key: Word; Shift: TShiftState);
3   begin
4     ComboBox1.hint := inttostr(Combobox1.selstart);
5   end;