hacky program to demonstrate _KDE_NET_WM_COLOR_SCHEME

propset.c

#include <X11/Xlib.h>
#include <X11/Xos.h>
#include <X11/Xatom.h>

int main(int argc, const char* argv[]) 
{
    Display *d = XOpenDisplay(NULL);
    Window w = XCreateSimpleWindow(d, RootWindow(d, 0), 1, 1, 500, 500, 0,
                                   BlackPixel (d, 0), BlackPixel(d, 0));
    Atom a;
    XMapWindow(d, w);
    if ((a = XInternAtom(d, argv[1], False)) != None)
        XChangeProperty(d, w, a, XA_STRING, 8, PropModeReplace, argv[2], strlen(argv[2]));
    XFlush(d);
    sleep(30);
    return 0;
}