How to determine if a font support a Unicode?

Hi there,

We know the font Ariel Unicode MS support Unicode U+5929 and Ariel not. Can any one tell:

1. How do we determine if the font Ariel Unicode MS is installed?

2. How can we determine if a font support Unicode U+5929?

I appreciate any help,

I made a couple of functions:

Code:

#define _WIN32_WINNT 0x0500 /* GetGlyphIndices requires Windows 2000 or later. */ 
#include <windows.h>
#include <stdio.h>

static
int CALLBACK EnumFontFamProc( CONST ENUMLOGFONT *lpelf,    // logical-font data
                              CONST NEWTEXTMETRIC *lpntm,  // physical-font data
                              DWORD FontType,        // type of font
                              LPARAM lParam          // application-defined data
                             )
{
    *((BOOL*)lParam) = TRUE;
    return 0;
}

/*
 * Checks if a font is installed.
 * Based on OpenOffice code from:
 * http://sourceforge.krugle.com/examples/p-CsDwK3y6Lb7A3V1s/winos.cxx
 */
BOOL IsFontInstalled( LPCTSTR szFontName )
{
    BOOL    bIsInstalled = FALSE;
    HDC     hDC = GetDC( NULL );

    EnumFontFamilies( hDC, szFontName, (FONTENUMPROC) EnumFontFamProc, (LPARAM) &bIsInstalled );

    ReleaseDC( NULL, hDC );

    return bIsInstalled;
}

/*
 * Checks if a character glyph is available for the currently selected font
 * in the given HDC.
 * Note: Does not support unicode surrogates.
 */
BOOL IsCharacterAvailableInHDC( HDC hdc, WORD character )
{
	WORD indice;

	return (GetGlyphIndicesW( hdc, &character, 1,
	                          &indice, GGI_MARK_NONEXISTING_GLYPHS ) != GDI_ERROR &&
	        indice != 0xffff);
}

/*
 * Checks if a character glyph is available in a given font.
 * Note: Does not support unicode surrogates.
 */
BOOL IsCharacterAvailableInFont( LPCTSTR szFontName, WORD character )
{
	HDC   hdc;
	HFONT hFontOld;
	HFONT hFontNew;
	BOOL  bResult;

	/* Create the given font with default parameters. */
	hFontNew = CreateFont( 0, 0, 0, 0, FW_DONTCARE, FALSE, FALSE, FALSE, 
	                       DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
	                       DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE, 
	                       szFontName ); 
	if (hFontNew == NULL) return FALSE;

	/* Create a screen compatible DC and select our new font. */
	hdc = GetDC( NULL );
	hFontOld = (HFONT) SelectObject( hdc, hFontNew );

	/* Check if the character is available. */
	bResult = IsCharacterAvailableInHDC( hdc, character );

	/* Cleanup. */
	SelectObject( hdc, hFontOld);
	DeleteObject( hFontNew );
	ReleaseDC( NULL, hdc );

	return bResult;
}

int main(void)
{
	if (IsFontInstalled( TEXT("Arial") ) )
	{
		printf("Arial is installed!\n");
	}

	if (IsFontInstalled( TEXT("Arial Unicode MS") ))
	{
		printf("Arial Unicode MS is installed!\n");
	}

	if (IsCharacterAvailableInFont( TEXT("Arial"), 0x01FD ))
	{
		printf("Character is available!\n");
	}

	getchar();
	return 0;
}