#pragma comment (lib, "User32.lib")
#pragma comment (lib, "gdi32.lib")

#include<Windows.h>
#include<TCHAR.H>

LRESULT CALLBACK W(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	static TCHAR str[100];
	static int count, yPos;
	RECT rt = { 0,0 , 1000, 1000 };

	switch (iMsg)
	{
	case WM_CREATE:
		count = 0;
		yPos;
		break;
	case WM_PAINT:
		hdc = BeginPaint(hwnd, &ps);
		DrawText(hdc, str, _tcslen(str), &rt, DT_TOP | DT_LEFT);
		EndPaint(hwnd, &ps);
		break;
	case WM_CHAR:
		if (wParam == VK_BACK && count >= 0)
		{
			if (count != 0) count--;
			if (str[count] == VK_RETURN) count--;
		}
		else
		{
			str[0] = wParam;
			count++;
			for (int i = count; i > 0; i--)
			{
				str[i] = str[i - 1];
			}
		}
		str[0] = ' ';
		InvalidateRgn(hwnd, NULL, TRUE);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	}
	return DefWindowProc(hwnd, iMsg, wParam, lParam);
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int nCmdShow)
{
	HWND hwnd;
	MSG msg;
	WNDCLASS c;
	c.style = CS_HREDRAW | CS_VREDRAW;
	c.lpfnWndProc = W;
	c.cbClsExtra = 0;
	c.cbWndExtra = 0;
	c.hInstance = hInstance;
	c.hIcon = LoadIcon(NULL, IDI_QUESTION);
	c.hCursor = LoadCursor(NULL, IDC_IBEAM);
	c.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
	c.lpszMenuName = NULL;
	c.lpszClassName = _T("Window Class Name");
	RegisterClass(&c);
	hwnd = CreateWindow(_T("Window Class Name"),
		_T("박현빈의 첫 번째 윈도우"),
		WS_OVERLAPPEDWINDOW,
		200,
		300,
		600,
		400,
		NULL,
		NULL,
		hInstance,
		NULL
	);
	ShowWindow(hwnd, nCmdShow);
	UpdateWindow(hwnd);
	while (GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return (int)msg.wParam;
}