add frame rendering

GDP/D3D9/Window.cpp

@@ -16,12 +16,15 @@ INT Window::init(HINSTANCE hInstance, UINT width, UINT height)
 	if (!RegisterClass(&wc)) return 100;
 
 	// 3. adjust window size (optional)
+	DWORD style;
+	style = WS_OVERLAPPEDWINDOW; // window with border & title
+	//style = WS_POPUP; // borderless window
 
 	// 4. create window instance
 	_hWnd = CreateWindow(
 		wc.lpszClassName, // class name for window instance
 		wc.lpszClassName, // window title
-		WS_OVERLAPPEDWINDOW, // visual window style
+		style, // visual window style
 		100, 100, // window position (left-top corner)
 		width, height, // window size
 		nullptr, // handle to parent window
@@ -75,7 +78,7 @@ LRESULT WindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 		PostQuitMessage(0);
 		return 0;
 	case WM_KEYDOWN:
-		if (wParam == VK_ESCAPE) 
+		if (wParam == VK_ESCAPE)
 		{
 			DestroyWindow(hWnd);
 			return 0;