Returns the extension portions of a file name.
function ExtractFileExt(const FileName: string): string; overload;
AnsiString ExtractFileExt(const AnsiString FileName);
Use ExtractFileExt to obtain the extension from a file name. For example, the following code returns the extension of the file name specified by a variable named MyFileName:
MyFilesExtension := ExtractFileExt(MyFileName); // Delphi
MyFilesExtension = ExtractFileExt(MyFileName); // C++
The resulting string includes the period character that separates the name and extension parts. This string is empty if the given file name has no extension.
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