啥也不说,直接上代码,

终端键入:gcc -o main gtk.c `pkg-config --cflags --libs gtk+-2.0`

以上是编译命令;运行之后会截图保存

#include <stdlib.h>
#include <stdio.h>
#include <gtk/gtk.h>

int main(int argc,char **argv)
{
	GtkWidget *window;
	gtk_init(&argc,&argv);     
	window=gtk_window_new(GTK_WINDOW_TOPLEVEL);  
	gtk_window_set_title((GtkWindow*)window,"gtk-test 2.0");
	g_signal_connect(G_OBJECT((GtkWindow*)window),"delete_event",	G_CALLBACK(gtk_main_quit),NULL);  
	gtk_widget_show(window); 
	//gtk_window_fullscreen(window);
	
	GdkScreen *screen = gdk_screen_get_default();  
	GdkWindow * root_window = gdk_get_default_root_window (); 
	if (!root_window )
	{    
	  return TRUE;
	}
	int w = gdk_screen_get_width(screen);  
	int h = gdk_screen_get_height(screen);

	GdkPixbuf * pixbuf = gdk_pixbuf_get_from_drawable(NULL, root_window, NULL,0, 0, 0, 0, w, h); // 抓图
	gdk_pixbuf_save(pixbuf, "screen.jpg", "jpeg", NULL, "quality", "100",NULL);

	gtk_main(); 
	return FALSE;
}