DelphiBasics
ProcessPath
Procedure		 Split a drive/path/filename string into its constituent parts FileCtrl unit
 procedure ProcessPath(const FullName string; var Drive Char; var Dir string; var FileName string);
Description
The ProcessPath procedure splits a full file name FullName into its constituent Drive, Dir and FileName parts.
Related commands
ExtractFileDirExtracts the dir part of a full file name
ExtractFileDriveExtracts the drive part of a full file name
ExtractFileExtExtracts the extension part of a full file name
ExtractFileNameExtracts the name part of a full file name
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Example code : Ask the user for a file name, and show the constituent parts
var
  selectedFile   : string;
  drive          : char;
  path, fileName : string;

begin
  // Ask the user to select a file
  if PromptForFileName(selectedFile)
  then
  begin
    // Display this full file/path value
    ShowMessage('Selected file = '+selectedFile);

    // Split this full file/path value into its constituent parts
    ProcessPath(selectedFile, drive, path, fileName);
    ShowMessage('drive = '+drive);
    ShowMessage('path = '+path);
    ShowMessage('fileName = '+fileName);
  end;
end;
Show full unit code
  { The user selects C:\Files\data.txt and hits OK }
  
  Selected file = C:\Files\data.txt
  drive = C
  path = \Files
  filename = data.txt
 
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