<summary>
Enables/disables pair-kerning on the given range.
</summary>
<param name="isPairKerningEnabled">The Boolean flag indicates whether text is pair-kerned.</param>
<param name="textRange">Text range to which this change applies.</param>
<returns>
Standard HRESULT error code.
</returns>
<summary> Enables/disables pair-kerning on the given range. </summary> <param name="isPairKerningEnabled">The Boolean flag indicates whether text is pair-kerned.</param> <param name="textRange">Text range to which this change applies.</param> <returns> Standard HRESULT error code. </returns>