Convenience macro for libssh2_channel_x11_req_ex(3) calls
#include <libssh2.h>
int libssh2_channel_x11_req(LIBSSH2_CHANNEL *channel, int screen_number);
This is a macro defined in a public libssh2 header file that is using the underlying function libssh2_channel_x11_req_ex(3).