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function ExtractFileExt(const S: FullFileName): string;
Returns the extension part of a string containing full path and file name.
If FullFileName ends with a backslash (\), the function returns last string. If FullFileName contatins no directory or drive information, the result is FullFileName unchanged;
var sFullAppPath, sAppExt : string;
sFullAppPath := ParamStr(0);
sAppExt := ExtractFileName(sFullAppPath);
//sFullAppPath = c:\FirstDir\SecondDir\SuperAppName.exe
//sAppExt = exe
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Searching for Files
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ExtractFileDir,
ExtractFileName
ParamStr,
ChangeFileExt
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