If you need to compare two files using WinMerge, you can use the _WinMergeCompare2Files function as in the following example:
_Example()
Func _Example()
FileCopy(@ScriptFullPath, @ScriptFullPath & '.txt')
FileWrite(@ScriptFullPath & '.txt', @CRLF & 'TEST' & @CRLF & @CRLF)
_WinMergeCompare2File...