EM_SETREADONLY Overview  Group

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

GetWindowLong