Using functions in Windows

I'm confused as on how to use functions in Windows other than the main wndproc. In the previous message I posted the code was to display a high score table. Now that I have added a menu to my window how do I add extra functions? e.x. new game, view scores, view credits, exit.

In the code below I want to move the *_highscore functions into the show_highscore function. This is where my confusion is.

Code:

case WM_PAINT:
   {
       struct list high_score[MAX_SCORES] = {{{0}}};
       RECT rcClient;
       PAINTSTRUCT ps;
       HDC hdc = BeginPaint(hwnd,&ps);
       GetClientRect(hwnd, &rcClient);
/*    load_highscore("hiscore.dat", high_score);
       display_highscore(hwnd,hdc, &rcClient, high_score);
       save_highscore("hiscore.dat", high_score);*/
       EndPaint(hwnd, &ps);
   }
break;
	
void show_highscores(void)
{

}

I'm not exactly sure what you are asking but I think I understand. If you want to add a menu (or any other type of window) via the CreateWindow() function just use the HWND of the parent window for the hWndParent parameter. If you are asking how to make a function that is also capable of drawing to the screen you need to pass the HDC as one of its parameters:

Example

Code:

int show_scores(HDC hdc) {
  // do stuff that draws to the hdc
}

I assume you mean that you want to access these functions from a menu. Assign a command ID for each menu item in the resource file, and process them with the WM_COMMAND message:

Code:

case WM_COMMAND:
  switch(LOWORD(wParam)){
   case 1: // first command
    //....
    break;
   case 2: // second command
    //....
    break;
   default:
    break;
  }
  break;

Make sure the command IDs do not conflict with the IDs for any child windows that the window may have.