Here is how to delete files with a wildcard. It requires SysUtls in the uses clause.
procedure DeleteFiles(FilePath, Wildcard: string);
var cSearchRec: TSearchRec;
iFind : integer;
sPath : string;
begin
sPath := IncludeTrailingPathDelimiter(FilePath);
iFind := FindFirst(sPath + Wildcard, faAnyFile, cSearchRec);
while iFind = 0 do
begin
DeleteFile(sPath + cSearchRec.Name);
iFind := FindNext(cSearchRec);
end;
FindClose(cSearchRec);
end;
In the while loop you can add additional conditions, like only files that have a specific prefix e.g.
if Pos(fPrefix, Copy(cSearchRec.Name, 0, Length(fPrefix))) > 0 then
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