//gtk_widget_set_size_request(Drawing->Drawing_Area_V->window, 50, 50);
g_object_set_data_full(
G_OBJECT(Drawing->Drawing_Area_V),
//gtk_widget_set_size_request(Drawing->Drawing_Area_V->window, 50, 50);
g_object_set_data_full(
G_OBJECT(Drawing->Drawing_Area_V),