Rendering Text with Direct2D & DirectWrite

#include "stdafx.h"
#include "hwinDef.h"
#include "hwinGuid.h"
#include "hwinException.h"

namespace harlinn
{
    namespace windows
    {

        Guid Guid::NewGuid( )
        {
            Guid result;
            auto hr = CoCreateGuid( &result );
            CheckHRESULT( hr );
            return result;
        }

        bool Guid::TryParse( const WideString& theGuidAsAString, Guid& result )
        {

            auto hr = IIDFromString( theGuidAsAString.c_str( ), &result );
            if ( hr != S_OK )
            {
                result = { 0, };
                return false;
            }
            return true;
        }

        Guid Guid::Parse( const WideString& theGuidAsAString )
        {
            GUID result;
            auto hr = IIDFromString( theGuidAsAString.c_str( ), &result );
            if ( FAILED( hr ) )
            {
                CheckHRESULT( hr );
            }
            return result;
        }


        String Guid::ToString( ) const
        {
            LPOLESTR ptr = nullptr;
            auto hr = StringFromIID( *this, &ptr );
            if ( SUCCEEDED( hr ) )
            {
                WideString result( ptr );
                CoTaskMemFree( ptr );
#ifdef HWIN_STRING_IS_WIDE
                return result;
#else
                return String::From( result );
#endif
            }
            else
            {
                CheckHRESULT( hr );
                return String( );
            }
        }

        WideString Guid::ToWideString( ) const
        {
            LPOLESTR ptr = nullptr;
            auto hr = StringFromIID( *this, &ptr );
            if ( SUCCEEDED( hr ) )
            {
                WideString result( ptr );
                CoTaskMemFree( ptr );
                return result;
            }
            else
            {
                CheckHRESULT( hr );
                return WideString( );
            }
        }

        AnsiString Guid::ToAnsiString( ) const
        {
            LPOLESTR ptr = nullptr;
            auto hr = StringFromIID( *this, &ptr );
            if ( SUCCEEDED( hr ) )
            {
                WideString result( ptr );
                CoTaskMemFree( ptr );
                return AnsiString::From( result );
            }
            else
            {
                CheckHRESULT( hr );
                return AnsiString( );
            }
        }

    }
}