EM_SETREADONLY

Overview

Group

Quick Info

Windows NT
Yes
Win95
Yes
Win32s
Yes
Import Library
-
Header File
winuser.h
Unicode
No
Platform Notes
None

An application sends an EM_SETREADONLY message to set or remove the read-only style (ES_READONLY) of an edit control.

EM_SETREADONLY

wParam = (WPARAM) (BOOL) fReadOnly; // read-only flag

lParam = 0; // not used; must be zero

Parameters
fReadOnly

Value of wParam. Specifies whether to set or remove the ES_READONLY style. A value of TRUE sets the ES_READONLY style; a value of FALSE removes the ES_READONLY style.

Return Values
If the operation succeeds, the return value is nonzero; otherwise, it is zero.

Remarks
When an edit control has the ES_READONLY style, the user cannot change the text within the edit control.

To determine whether an edit control has the ES_READONLY style, use the GetWindowLong function with the GWL_STYLE flag.