C / C++ / MFC

// global variable, it contains the handle of all dialogs
std::vector<HWND> g_Dialogs;

// your main loop somewhere near your main()
MSG msg;
while (::GetMessage(&msg, NULL, 0, 0)) 
{
    // copying the global array because it might be modified during iteration
    // and we iterate over the copy...
    std::vector<HWND> dialogs(g_Dialogs);
    bool was_dialog_message = false;
    for (size_t i=0,e=dialogs.size(); i<e; ++i)
    {
        if (::IsWindow(dialogs[i]) && ::IsDialogMessage(dialogs[i], &msg))
        {
            was_dialog_message = true;
            break;
        }
    }
    if (!was_dialog_message)
    { 
        ::TranslateMessage(&msg); 
        ::DispatchMessage(&msg); 
    }
}

roza123 wrote:

Use as many define directives and macros to achieve this task.

//Visual C++ 6 code

#include <iostream> 
#include <conio.h>
#include <windows.h>
#include <stdio.h>
using namespace std;

#define KB_UP 72
#define KB_DOWN 80
#define KB_LEFT 75
#define KB_RIGHT 77
#define KB_ESCAPE 27
#define KB_F8 66
#define KB_ENTER 13


int KB_code=0;
int ch=0;
int ON_OFF_SWITCH=-1;
unsigned long int counter=0;

void gotoxy(int x, int y);
void clrscr();
void do_keyboard_processing_stuff(void);
 
int main(void)
{
   

   while(KB_code != KB_ESCAPE )
   { 
       
       if (ON_OFF_SWITCH==1) counter++;
       gotoxy(22,10);
	   cout<<"Infinity Counter = "<<counter<<"  ";

	   do_keyboard_processing_stuff();
 
   }
   
  cout<<"\n\n";
  return 0;
}



void gotoxy(int x, int y)
{
    COORD coord;
    coord.X = x; coord.Y = y;
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
    return;
}

 
void clrscr()
{
    COORD coordScreen = { 0, 0 };
    DWORD cCharsWritten;
    CONSOLE_SCREEN_BUFFER_INFO csbi;
    DWORD dwConSize;
    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);

    GetConsoleScreenBufferInfo(hConsole, &csbi);
    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
    FillConsoleOutputCharacter(hConsole, TEXT(' '), dwConSize, coordScreen, &cCharsWritten);
    GetConsoleScreenBufferInfo(hConsole, &csbi);
    FillConsoleOutputAttribute(hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten);
    SetConsoleCursorPosition(hConsole, coordScreen);
    return;
}

void do_keyboard_processing_stuff(void)
{

    if (kbhit())
      {
            KB_code = getch();
            //cout<<"KB_code = "<<KB_code<<"\n";
            if (KB_code!=KB_ENTER) ON_OFF_SWITCH=-ON_OFF_SWITCH;
			
      
            switch (KB_code)
            {
          
                case KB_ESCAPE:
                           
					 
                break;

                case KB_LEFT:
                           //Do something
                break;

                case KB_RIGHT:
                           //Do something                     
                break;

                case KB_UP:
                           //Do something                     
                break;

                case KB_DOWN:
                           //Do something                     
                break;

                case KB_ENTER:
					clrscr();
                    counter=0;
					ON_OFF_SWITCH=-1;
                                                 
                break;


            }        

      }

}