<summary>
Gets the spacing between characters.
</summary>
<param name="currentPosition">The current text position.</param>
<param name="leadingSpacing">The spacing before each character, in reading order.</param>
<param name="trailingSpacing">The spacing after each character, in reading order.</param>
<param name="minimumAdvanceWidth">The minimum advance of each character,
to prevent characters from becoming too thin or zero-width. This
must be zero or greater.</param>
<param name="textRange">The position range of the current format.</param>
<returns>
Standard HRESULT error code.
</returns>
<summary> Gets the spacing between characters. </summary> <param name="currentPosition">The current text position.</param> <param name="leadingSpacing">The spacing before each character, in reading order.</param> <param name="trailingSpacing">The spacing after each character, in reading order.</param> <param name="minimumAdvanceWidth">The minimum advance of each character, to prevent characters from becoming too thin or zero-width. This must be zero or greater.</param> <param name="textRange">The position range of the current format.</param> <returns> Standard HRESULT error code. </returns>