User interface > Translation > Scanning dependencies
Most Delphi units depend on other units, which are included in the uses clause. Delphi2Cpp scans the included files in so far, as they are placed either in the same directory as the actual file or in a directory, which is set in the search paths.
The translation will produce the best results if the Delphi VCL is included. In this case, however, the translations of the first files will slow down significantly. All information that once has been obtained from the interface parts of the processed files is remembered for the translation of further files.
The information can be cleared by the according command in the start menu or the tool bar button 
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