FileInfo.com - The File Extensions Resource

.CCH File Extension

File Type	Corel Chart File
File Format	File
Common?	No
File Description	Chart or diagram created with Corel Chart, a charting program included with earlier versions of CorelDRAW, such as CorelDRAW 5; saved in a proprietary format that can only be opened with Corel software.
Program(s) that open cch files	Windows: Corel Chart

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/cch