HRESULT IDWriteTextLayout::HitTestTextRange([In] unsigned int textPosition,[In] unsigned int textLength,[In] float originX,[In] float originY,[Out, Buffer, Optional] DWRITE_HIT_TEST_METRICS* hitTestMetrics,[In] unsigned int maxHitTestMetricsCount,[Out] unsigned int* actualHitTestMetricsCount)

'宣言
 
Public Overloads Function HitTestTextRange( _
   ByVal textPosition As System.Integer, _
   ByVal textLength As System.Integer, _
   ByVal originX As System.Single, _
   ByVal originY As System.Single, _
   ByVal hitTestMetrics() As HitTestMetrics, _
   ByVal maxHitTestMetricsCount As System.Integer, _
   ByRef actualHitTestMetricsCount As System.Integer _
) As HResult

public HResult HitTestTextRange( 
   System.int textPosition,
   System.int textLength,
   System.float originX,
   System.float originY,
   HitTestMetrics[] hitTestMetrics,
   System.int maxHitTestMetricsCount,
   out System.int actualHitTestMetricsCount
)