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///////////////////////////////////////////////////////////////////////////////////
// This source shows how to Hijack the DarkGDK's WNDPROC from the main window. By
// doing this, you allow your game to intercept Window's Messages (if you want 
// to do so) and process them yourself.  
//
// This is good if you want to send your own messages through the message pump. 
// Such messages may include; SHOW_BADDIES_DEATH_ANIMATION, or MAKE_AI_THINK etc.
///////////////////////////////////////////////////////////////////////////////////

// whenever using Dark GDK you must ensure you include the header file
#include "DarkGDK.h"
#include "globstruct.h"

// We're going to Hijack GDK's WNDPROC from them. We need to keep a hold of the
// original so that we can let the GDK handle whatever messages we don't... 
// NOTE: Unless it's a GAME_SPECIFIC_MESSAGE (ie: SHOW_BADDY_DYING) you *MUST* 
// call the original. They took over the original for a reason! 
WNDPROC GDKWndProc = NULL;

// Here's our WNDPROC that we will use to hijack the GDK's WNDPROC...
LRESULT WINAPI MyWndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam ) {

  // Only catches Close option of the System Menu (Top-Left Corner) or the
  // Close Button from the Top-Right Corner; but illustrates the point...
  if (uMsg == WM_CLOSE)
    MessageBox( NULL, "We are about to close!", "Close Message...", MB_OK );

  // Make sure you call the original so that GDK can handle the *real* messages...
  return CallWindowProc(GDKWndProc, hWnd, uMsg, wParam, lParam); 
}

// the main entry point for the application is this function
void DarkGDK ( void )
{
  // First thing we're gonna do is take over GDK's WNDPROC with our own...
  GDKWndProc = (WNDPROC) SetWindowLong( g_pGlob->hWnd, GWL_WNDPROC, (LONG) MyWndProc );

  // Yeeeee-hhhhaaaaawwwwww....... 
  // Now we are ready to take over the World; the GAME-WORLD that is!

	// turn on sync rate and set maximum rate to 60 fps
	dbSyncOn   ( );
	dbSyncRate ( 60 );

	// our main loop
	while ( LoopGDK ( ) )
	{
		// update the screen
		dbSync ( );
	}

	// return back to windows
	return;
}