<summary>
Determines whether the font supports the specified character.
</summary>
<param name="unicodeValue">Unicode (UCS-4) character value.</param>
<param name="exists">Receives the value TRUE if the font supports the specified character or FALSE if not.</param>
<returns>
Standard HRESULT error code.
</returns>
<summary> Determines whether the font supports the specified character. </summary> <param name="unicodeValue">Unicode (UCS-4) character value.</param> <param name="exists">Receives the value TRUE if the font supports the specified character or FALSE if not.</param> <returns> Standard HRESULT error code. </returns>