2.(45 points) Mouse interrupt handling This example is designed to ask you to clean the screen by clicking mouse. In the code, the following line must be included: #define KEY_DOWN(VK_NONAME) ((GetAsynckeyState(VK_NONAME) & 0x8000) ? 1:0) In addition, VK_LBUTTON, VK_RBUTTON, VK_MBUTTON indicate left button, Right button, Middle button respectively. //Example #include #include #define KEY_DOWN(VK_NONAME) ((GetAsyncKeyState(VK_NONAME) & 0x8000) ? 1:0) //Must have this line using namespace std; int main() { while (1) ( printf("Trick or treat. Smell my feet. Give me something good to eat. ONLY CLICK TO CLEAN THE SCREEN "); if (KEY DOWN(VK_LBUTTON)) printf("Left click to clean the screen. Pause 1 second."); Sleep(1000);//pause 1 second system("cls");//Clean the screen } if (KEY_DOWN(VK_RBUTTON)) { printf("Right click to clean the screen. Pause 1 second."); Sleep(1000)://pause 1 second system("cls");//Clean the screen } if (KEY_DOWN(VK_MBUTTON)) { printf("Middle click to clean the screen. Pause 1 second."); Sleep(1000);//pause l second system("cls");//Clean the screen } Sleep(20); //set time interval. return 0; } a. Does the code below work as well? Please explain the effect of { clause. } in the if if (KEY_DOWN(VK_MBUTTON)) printf("Middle click to clean the screen. Puuse 1 second."); Sleep(1000)://pause 1 second system("cls");//Clean the screen b. How the function Sleep(1000) works? c. Please try to design a new feature and modify the code. Show your code below