C / C++ / MFC

WCHAR g_szCurrentString[30] =
{
	'H', 'e', 'l', 'l', 'o',
	0x064a, 0x064f, 0x0633, 0x0627, 0x0648, 0x0650, 0x064a, 
	'W', 'o', 'r', 'l', 'd',
	0	
};


SCRIPT_STRING_ANALYSIS GetStringAnalysis(HDC hdc, WCHAR *wstr, UINT wlen)
{
	SCRIPT_CONTROL			scriptControl = { 0 };
	SCRIPT_STATE			scriptState   = { 0 };
	SCRIPT_STRING_ANALYSIS	scriptStringAnalysis;

	ScriptStringAnalyse(
		hdc,
		wstr,
		wlen,
		wlen * 2,
		-1,				// Unicode string
		SSA_GLYPHS|SSA_FALLBACK,
		0,				// no clipping
		&scriptControl,
		&scriptState,
		0,
		0,
		0,
		&scriptStringAnalysis
	);

	return scriptStringAnalysis;
}

void Uniscribe_TextOut(HDC hdc, int xpos, int ypos, int selstart, int selend)
{
	SCRIPT_STRING_ANALYSIS ssa = GetStringAnalysis(hdc, g_szCurrentString, lstrlen(g_szCurrentString));

	if(selend < selstart)
	{
		int t = selstart;
		selstart = selend;
		selend   = t;
	}

	ScriptStringOut(
		ssa,
		xpos,
		ypos,
		0,
		NULL,
		selstart,
		selend,
		FALSE
	);

	ScriptStringFree(&ssa);
}
void PaintWnd(HWND hWnd)
{
	PAINTSTRUCT ps;
	RECT	rect;
	HDC		hdcMem;
	HBITMAP hbmMem;

	BeginPaint(hWnd, &ps);

	GetClientRect(hWnd, &rect);

	//
	//	Create memory-dc for double-buffering
	//	(StringStringOut flickers badly!!)
	//
	hdcMem = CreateCompatibleDC(ps.hdc);
	hbmMem = CreateCompatibleBitmap(ps.hdc, rect.right, rect.bottom);
	SelectObject(hdcMem, hbmMem);
	//SelectObject(hdcMem, g_hFont);

	//	paint the text
	FillRect(hdcMem, &rect, GetSysColorBrush(COLOR_WINDOW));
	Uniscribe_TextOut(hdcMem, XBORDER, YBORDER, nSelStart, nSelEnd);

	// copy to window-dc
	BitBlt(ps.hdc, 0, 0, rect.right,rect.bottom, hdcMem, 0, 0, SRCCOPY);

	// cleanup
	DeleteObject(hbmMem);
	DeleteDC(hdcMem);
	EndPaint(hWnd, &ps);
}