#include

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
HINSTANCE g_hlnst;
LPCTSTR lpszClass=TEXT("TextOut");

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevlnstance,
					 LPSTR lpszCmdParam, int nCmdShow)
{
	HWND hWnd;
	MSG Message;
	WNDCLASS WndClass;
	g_hlnst = hInstance;
	
	//1. 윈도우 속성값 등록
	WndClass.cbClsExtra = 0;
	WndClass.cbWndExtra = 0;
	WndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
	WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	WndClass.hInstance = hInstance;
	WndClass.lpfnWndProc = WndProc;
	WndClass.lpszClassName = lpszClass;
	WndClass.lpszMenuName = NULL;
	WndClass.style = CS_HREDRAW | CS_VREDRAW;
	RegisterClass(&WndClass);  //주소에 write
	
	//2. 윈도우 생성
	hWnd =  CreateWindow(lpszClass, lpszClass, WS_OVERLAPPEDWINDOW,
		300, 300, 300, 300,
		NULL, (HMENU)NULL, hInstance, NULL);
	ShowWindow(hWnd, nCmdShow);  //화면에 윈도우를 띄움
	
	//3. 메시지 처리(무한반복)
	while(GetMessage(&Message, NULL, 0, 0)){
		TranslateMessage(&Message);
		DispatchMessage(&Message);
	}
	return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	static TCHAR str[256];
	int len;
	
	switch(iMessage){
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
		
	case WM_LBUTTONDOWN:
		MessageBox(hWnd, TEXT("마우스 왼쪽 버튼을 눌렀습니다."),
			TEXT("메시지 박스"), MB_OK);
		return 0;
	
	case WM_RBUTTONDOWN:
		if(MessageBox(hWnd, TEXT("마우스 오른쪽 버튼을 눌렀습니까?"),
			TEXT("메시지 박스"), MB_YESNO) == IDYES)
		{
			MessageBox(hWnd, TEXT("똑똑한 놈이군.."), TEXT("메시지 박스"), MB_OK);
		}else{
			MessageBox(hWnd, TEXT("빙신 지가 먼키를 눌렀는지도 몰라~"),
				TEXT("메시지 박스"), MB_OK);
		}
		return 0;

	case WM_CHAR:
		len=lstrlen(str);
		str[len] = (TCHAR)wParam;
		str[len+1] = 0;
		InvalidateRect(hWnd, NULL, FALSE);
		return 0;

	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		TextOut(hdc, 100, 100, str, lstrlen(str));
		EndPaint(hWnd, &ps);
		return 0;
	}
	return(DefWindowProc(hWnd, iMessage, wParam, lParam));
}

출력결과