117.C语言实现桌面输出图片,桌面输出文字,桌面画线

通过获取窗口句柄,然后获取窗口DC,然后画图

 #include <Windows.h>
 #include <stdio.h>

 //桌面画线
 void drawLine()
 {
     //获取控制台窗口
     //HWND hwnd = GetConsoleWindow();
     //获取输出
     //HDC hdc = GetDC(hwnd);
     //获取桌面窗口
     HWND hwnd = GetDesktopWindow();
     //获取输出
     HDC hdc = GetWindowDC(hwnd);
     HPEN hpen = CreatePen(PS_SOLID, , RGB(, , ));
     SelectObject(hdc, hpen);//选中笔
     while ()
     {
         LineTo(hdc, , );
         Sleep();
         LineTo(hdc, , );
         Sleep();
         LineTo(hdc, , );
         Sleep();
         LineTo(hdc, , );
         Sleep();
         LineTo(hdc, , );
         Sleep();
         LineTo(hdc, , );
     }

     system("pause");
 }

 //桌面或者控制台显示图片
 void drawPic()
 {
     //获取控制台窗口
     //HWND hwnd = GetConsoleWindow();
     //获取输出
     //HDC hdc = GetDC(hwnd);
     //获取桌面窗口
     HWND hwnd = GetDesktopWindow();
     //获取输出
     HDC hdc = GetWindowDC(hwnd);
     HBRUSH brush = CreateSolidBrush(RGB(, , ));
     SelectObject(hdc, brush);//选中笔
     while ()
     {
         Rectangle(hdc, , , , );
         Sleep();
     }
     system("pause");

 }

 //桌面输出文字
 void drawText()
 {
     HWND hwnd = GetDesktopWindow();
     HDC hdc = GetWindowDC(hwnd);
     SetTextColor(hdc, RGB(, , ));
     //设置背景
     SetBkColor(hdc, RGB(, , ));

     while ()
     {
         HFONT hfont, hfontold;
         hfont = CreateFontA(
             ,
             ,
             ,
             ,
             FW_REGULAR,
             FALSE,
             FALSE,
             FALSE,
             GB2312_CHARSET,
             OUT_DEFAULT_PRECIS,
             CLIP_DEFAULT_PRECIS,
             PROOF_QUALITY,
             FIXED_PITCH | FF_MODERN,
             "隶书"
         );

         //选择字体
         hfontold = SelectObject(hdc, hfont);
         //在区域输出文字
         /*RECT rctext;
         rctext.left = 10;
         rctext.top = 10;
         rctext.right = 800;
         rctext.bottom = 800;
         DrawTextA(hdc, "桌面文字输出测试", strlen("桌面文字输出测试"), &rctext, DT_CENTER);*/
         TextOutA(hdc, , , "桌面文字输出测试", strlen("桌面文字输出测试"));
         SelectObject(hdc, hfontold);
         Sleep();
     }
 }

 void main()
 {
     //drawPic();
     //drawLine();
     drawText();
     system("pause");
 }

• 桌面绘图

   #include <stdio.h>
   #include <stdlib.h>
   #include <windows.h>
  
   void main()
   {
       HWND hwnd = GetConsoleWindow();
       HDC hdc = GetDC(hwnd);
       //创建兼容DC
       HDC memdc = CreateCompatibleDC();
       //载入位图
       HBITMAP bit = LoadImageA(hwnd, "C:\\Users\\Administrator\\Desktop\\1.bmp", IMAGE_BITMAP, , , LR_LOADFROMFILE | LR_CREATEDIBSECTION);
       //位图有兼容DC绑定
       SelectObject(memdc, bit);
       //兼容DC与hdc绑定
       BitBlt(hdc, , , , , memdc, , , SRCCOPY);
  
       system("pause");
   }