得到图案定义数据

[helpstring("method GetPatternDefinitionAt")]
HRESULT GetPatternDefinitionAt([in] LONG index, [out] DOUBLE* angle, [out] DOUBLE* baseX, [out] DOUBLE* baseY, [out] DOUBLE* offsetX, [out] DOUBLE* offsetY, [out,retval] IMxDrawResbuf** dashes);