使用Xlib和old _MOTIF_WM_HINTS：

struct MwmHints {
    unsigned long flags;
    unsigned long functions;
    unsigned long decorations;
    long input_mode;
    unsigned long status;
};
enum {
    MWM_HINTS_FUNCTIONS = (1L << 0),
    MWM_HINTS_DECORATIONS =  (1L << 1),

    MWM_FUNC_ALL = (1L << 0),
    MWM_FUNC_RESIZE = (1L << 1),
    MWM_FUNC_MOVE = (1L << 2),
    MWM_FUNC_MINIMIZE = (1L << 3),
    MWM_FUNC_MAXIMIZE = (1L << 4),
    MWM_FUNC_CLOSE = (1L << 5)
};

Atom mwmHintsProperty = XInternAtom(display, "_MOTIF_WM_HINTS", 0);
struct MwmHints hints;
hints.flags = MWM_HINTS_DECORATIONS;
hints.decorations = 0;
XChangeProperty(display, window, mwmHintsProperty, mwmHintsProperty, 32,
        PropModeReplace, (unsigned char *)&hints, 5);

这些天NETWM / EWMH提示是首选，但据我所知，所有现代的窗口管理器还支持这一点。