HRESULT IDWriteFontFallback::MapCharacters(IDWriteTextAnalysisSource* source, UINT32 textPosition, UINT32 textLength, [in, optional] IDWriteFontCollection* baseFontCollection, [in, optional] wchar_t* baseFamilyName, DWRITE_FONT_WEIGHT baseWeight, DWRITE_FONT_STYLE baseStyle, DWRITE_FONT_STRETCH baseStretch, [out] UINT32* mappedLength, [out] IDWriteFont** mappedFont, [out] FLOAT* scale)

'Declaration
 
Public Overloads Function MapCharacters( _
   ByVal source As IntPtr, _
   ByVal textPosition As Integer, _
   ByVal textLength As Integer, _
   ByVal baseFontCollection As IntPtr, _
   ByVal baseFamilyName As IntPtr, _
   ByVal baseWeight As FontWeight, _
   ByVal baseStyle As FontStyle, _
   ByVal baseStretch As FontStretch, _
   ByRef mappedLength As Integer, _
   ByRef scale As Single _
) As Font

public Font MapCharacters( 
   IntPtr source,
   int textPosition,
   int textLength,
   IntPtr baseFontCollection,
   IntPtr baseFamilyName,
   FontWeight baseWeight,
   FontStyle baseStyle,
   FontStretch baseStretch,
   out int mappedLength,
   out float scale
)