The DIF_READONLY flag sets an edit box into a "read only" state.
The DIF_READONLY flag is applicable to the following dialog items:
| Control | Description |
|---|---|
| DI_COMBOBOX | Combo box. |
| DI_EDIT | Edit box. |
| DI_FIXEDIT | Fixed size edit box. |
| DI_PSWEDIT | Password edit box. |