捕捉电脑桌面并打印

#include <stdio.h>
#include <conio.h>//getch函数要定义此头文件
#include <windows.h>

int main()
{
    HWND hdesktopwnd,hconsolewnd;//桌面窗口的句柄,控制平台窗口句柄
    RECT rect,conrect;//矩形
    char title[1024];
    HDC hscreendc,hconsoledc,hmemdc;//DC 设备描述符，画板
    HBITMAP hbmp;//位图句柄
    printf("按下任意键开始捕获系统桌面\n");
    getch();//等待输入
    hdesktopwnd = GetDesktopWindow();//1.获取桌面窗口的句柄
    GetWindowRect(hdesktopwnd,&rect);//2.获取桌面窗口的矩形大小
    GetConsoleTitle(title,1024);//3.获取控制平台窗口的标题
    hconsolewnd = FindWindow(NULL,title);//4.根据标题获取控制平台窗口句柄
    GetWindowRect(hconsolewnd,&conrect);//5.获取控制平台窗口的矩形大小
    hscreendc = GetDC(hdesktopwnd);//6.获取桌面窗口的DC
    hconsoledc = GetDC(hconsolewnd);//7.获取控制台窗口的DC
    hmemdc = CreateCompatibleDC(hscreendc);//8.创建一个和桌面DC兼容的内存DC
    //9.把桌面窗口捕获到然后拷贝到兼容DC里
    hbmp = CreateCompatibleBitmap(hscreendc,rect.right,rect.bottom);
    SelectObject(hmemdc,hbmp);
    BitBlt(hmemdc,0,0,rect.right,rect.bottom,hscreendc,0,0,SRCCOPY);
    //10.把兼容DC里的位图画到控制台DC上
    StretchBlt(hconsoledc,0,0,conrect.right-conrect.left,
            conrect.bottom-conrect.top,hmemdc,0,0,1920,1280,SRCCOPY);
    //11.释放资源
    DeleteObject(hbmp);
    DeleteObject(hmemdc);
    ReleaseDC(hconsolewnd,hconsoledc);
    ReleaseDC(hdesktopwnd,hscreendc);    
    getch();//让程序暂停    
    return 0;
}