Position[in] Position of character in paragraph that starts the group of characters for which the parameters are set. It should be in the range from 0 to the length of paragraph.Count[in] A number of characters for which the parameters are set. It should be no less than 0 and meet the following requirement: position + count <= paragraph length + 1Params[in] This variable refers to the CharParams object that contains the new parameters for the group of characters. It must refer to a valid object.CharFlagMask[in] This variable may contain any OR combination of the CFL_prefixed flags. It specifies what character parameters are to be copied from the params object.StyleFlagMask[in] This variable may contain any OR combination of the StyleParamsEnum constants. It specifies what style parameters are to be copied from the params object.