GLP_WRITE
gl->pending_io = GLP_WRITE;
GlPendingIO pending_io = GLP_WRITE; /* The requested information */
gl[i].pending_io = GLP_WRITE;
gl->pending_io = GLP_WRITE;
gl->pending_io = GLP_WRITE;
gl->pending_io = GLP_WRITE; /* We will start by writing the prompt */
gl->pending_io = GLP_WRITE;