XCreateFontCursor example to test libXcursor dlopen

#include <X11/Xlib.h>
#include <X11/cursorfont.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
    Display *display;
    Window window;
    int screen;
    Cursor cursor;

    display = XOpenDisplay(NULL);
    if (display == NULL) {
        fprintf(stderr, "Cannot open display\n");
        exit(1);
    }

    screen = DefaultScreen(display);

    window = XCreateSimpleWindow(
        display,
        RootWindow(display, screen),
        100, 100, 400, 300, 1,
        BlackPixel(display, screen),
        WhitePixel(display, screen)
    );

    XSelectInput(display, window, ExposureMask | KeyPressMask);

    printf("mytrace: start\n");
    cursor = XCreateFontCursor(display, XC_hand2);
    printf("mytrace: end\n");

    XDefineCursor(display, window, cursor);

    XMapWindow(display, window);

    while (1) {
        XEvent event;
        XNextEvent(display, &event);

        if (event.type == Expose) {
        } else if (event.type == KeyPress) {
            break; // Exit on key press
        }
    }

    XFreeCursor(display, cursor);
    XDestroyWindow(display, window);
    XCloseDisplay(display);

    return 0;
}