This function sends a WM_SETWINDOWPARAMS message to the window identified by hwnd.

If this function references the window of another process, pszString must be in memory that is shared by both processes; otherwise, a memory error may occur.

If hwnd has a style of WS_FRAME, the title-bar window text is set.

Some window classes interpret the pszString in a special way. The tilde character ( ~ ) indicates that the following character is a mnemonic; for details, see