To compare files using another application, define an external format.
The Mask should be the set of file types it handles.
The Quick compare command line will be used whenever rules-based comparison results are needed. The return code should be 0 for a match and 1 for a mismatch.
The Compare view command line will be used whenever a comparison view is needed.
The Quick merge command line will be used whenever rules-based merge results are needed. The return code should be 0 for a match and 1 for a mismatch.
The Merge view command line will be used whenever a merge view is needed.
The Description can include any text you want.