SelectObject() doesn't work in non-static wndproc

[Distrust]

I have a base class for my window. All is working fine excluding SelectObject(). This function
doesn't set font handle to device context, so text is painting using system font. Why? Because of different place in memory? Why other functions such as SetBkMode() work?

P.S. Of course, always work, only one WM_PAINT. I typed two to show the essence of the problem.

// In this static function SelectObject() works, but not in non-static (NewWindowFunction):
LRESULT CALLBACK CChildWnd::StaticWindowFunction(HWND hWnd, UINT uMsg, WPARAM wPar, LPARAM lPar)
{
	if (uMsg == WM_NCCREATE)
		SetWindowLong(hWnd, GWL_USERDATA, (LONG) ((CREATESTRUCT *)lPar)->lpCreateParams);
	CChildWnd *pSelf = (CChildWnd *)GetWindowLong(hWnd, GWL_USERDATA);

	if (uMsg == WM_PAINT) // Only for test
	{
		PAINTSTRUCT ps;
		HDC hDC;
		HFONT hFont;
		HFONT hOldFont;
		RECT rect;

		hDC = BeginPaint(hWnd, &ps);
			hFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
			hOldFont = (HFONT)SelectObject(hDC, hFont); // Here it's ok!

			GetClientRect(hWnd, &rect);
			DrawTextExW(hDC, L"1111", 4, &rect, DT_LEFT | DT_NOPREFIX | DT_SINGLELINE | DT_INTERNAL, NULL);

			SelectObject(hDC, hOldFont);
		EndPaint(hWnd, &ps);

		return (LRESULT) 1;
	}

	return pSelf->NewWindowFunction(hWnd, uMsg, wPar, lPar);
}

LRESULT CALLBACK CChildWnd::NewWindowFunction(HWND hWnd, UINT uMsg, WPARAM wPar, LPARAM lPar)
{
	PAINTSTRUCT ps;
	HDC hDC;
	HFONT hFont;
	HFONT hOldFont;
	RECT rect;

	switch (uMsg)
	{
		case WM_PAINT:
			hDC = BeginPaint(hWnd, &ps);
			        hFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
				hOldFont = (HFONT)SelectObject(hDC, hFont); // Does not work.

				GetClientRect(hWnd, &rect);
				DrawTextExW(hDC, L"1111", 4, &rect, DT_LEFT | DT_NOPREFIX | DT_SINGLELINE | DT_INTERNAL, NULL);
		
				SelectObject(hDC, hOldFont);
			EndPaint(hWnd, &ps);

			return (LRESULT) 1;
		break;
		case WM_DESTROY:
			PostQuitMessage(0);
		break;
		default:
			return DefWindowProc(hWnd, uMsg, wPar, lPar);
	}

	return 0;
}