the DT_CALCRECT flag causes my text to dissappear

LRESULT CALLBACK printout(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	HDC hdc;
	static PAINTSTRUCT paint;
	static RECT textbox;
	static LPCTSTR blah = "this is a testing string with a bunch of insignifigant words that are for testing purposes only";

	switch(msg)
	{
		case WM_CLOSE:
		{
                        DestroyWindow(hwnd);
			break;
		}
                case WM_DESTROY:
		{
			PostQuitMessage(0);
			break;
		}
		case WM_PAINT:
		{
			hdc = BeginPaint(hwnd, &paint);

				SelectObject(hdc, hFont);
				SetRect(&textbox, 20, 20, 373, 60);
				DrawText(hdc, blah, strlen(blah), &textbox, DT_WORDBREAK | DT_CALCRECT );

			EndPaint(hwnd, &paint);
			break;
		}
		default:
                        return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}