Call this member function to modify a window's style.
If nFlags is nonzero, ModifyStyle calls the Windows API function SetWindowPos and redraws the window by combining nFlags with the following four preset flags:
SWP_NOSIZE Retains the current size.
SWP_NOMOVE Retains the current position.
SWP_NOZORDER Retains the current Z order.
SWP_NOACTIVATE Does not activate the window.
To modify a window's extended styles, see ModifyStyleEx.
For some styles in certain controls (the ES_READONLY style in the edit control, for example), ModifyStyle may not properly change the style because the control may need to perform special internal processing. In these cases, a corresponding message to change the style will be available (EM_SETREADONLY in the example mentioned).