EM_SETREADONLY
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.
See Also