In a multi-form program, when a particular (subsidiary) form starts, it doesn't provide the usual indication that the TComboBox (csDropDownList) with actual control has control.
If I move focus to another control and then tab to the first control, I get the usual dotted line box inside that control.
There are a number of ON.. actions on this control, but if I add another control on the same form with no controls (and set tab order = 0) I get the same result - the new control still doesn't show that it has control.
I tried to reproduce this functionality with a simple one-form program, but it works perfectly OK.
This "feature" seems to appear in all forms in this program except the main form.