#include <windows.h>

LRESULT CALLBACK WndProc( HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam ) 
{
	static HINSTANCE hinstDll;
	HOOKPROC hGetMsgProc;
	static HHOOK hKeyHook;

	switch( iMessage ) 
	{         
	case WM_CREATE:
		hinstDll = LoadLibrary("hooker.dll");
		if(!hinstDll){
			MessageBox(hWnd, "hooker.dllÀ» ·ÎµåÇÒ ¼ö ¾ø½À´Ï´Ù.", "¿À·ù", MB_OK);
			ExitProcess(1);
		}		

		hGetMsgProc = (HOOKPROC)GetProcAddress(hinstDll, "GetMsgProc");
		if(!hGetMsgProc){
			MessageBox(hWnd, "GetMsgProc ÇÔ¼ö¸¦ ãÀ» ¼ö ¾ø½À´Ï´Ù.", "¿À·ù", MB_OK);
			FreeLibrary(hinstDll);
			ExitProcess(1);
		}
		hKeyHook = SetWindowsHookEx(WH_GETMESSAGE, hGetMsgProc, hinstDll, 0);
		if(!hKeyHook){
			MessageBox(hWnd, "HookingÀ» ¼º°øÇÏÁö ¸øÇß½À´Ï´Ù.", "¿À·ù", MB_OK);
			FreeLibrary(hinstDll);
			ExitProcess(1);
		}
		return 0;
	case WM_DESTROY: 
		PostQuitMessage( 0 ); 
		break;
	} 
	return DefWindowProc( hWnd, iMessage, wParam, lParam ); 
} 

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, 
LPSTR lpCmdLine, int nShowCmd) 
{ 
	HWND hWnd;	
	MSG message;
	WNDCLASS wndclass;
	
	wndclass.cbClsExtra = 0; 
	wndclass.cbWndExtra = 0; 
	wndclass.hbrBackground = (HBRUSH)GetStockObject( GRAY_BRUSH );        
	wndclass.hCursor = LoadCursor( NULL, IDC_ARROW );        
	wndclass.hIcon =  LoadIcon( NULL, IDI_APPLICATION );
	wndclass.hInstance =  hInstance; 
	wndclass.lpfnWndProc = (WNDPROC)WndProc;
	wndclass.lpszClassName =  "WG WINDOW";        
	wndclass.lpszMenuName = NULL;
	wndclass.style = NULL;

	RegisterClass( &wndclass );	

	hWnd = CreateWindow("WG WINDOW", "¾Ñ½Î ³»°¡ ¸¸µé¾ú´Ù.", WS_OVERLAPPEDWINDOW,
			200, 200, 500, 500, NULL, (HMENU)NULL, hInstance, NULL ); 
	ShowWindow( hWnd, nShowCmd );    
    
	while( GetMessage( &message, NULL, 0, 0 ) ){         
		TranslateMessage( &message );      
		DispatchMessage( &message );    
	} 
	return message.wParam; 
}