ThredLibrary A simple mistake in the type of data through File_Copy function mistake in this line $File_CopyHandle = DllCall($iDll,"DWORD","File_Copy","wstr",$SourceFile,"wstr", $DestFile,"wstr",$BytesNumberAtaTime,"DWORD",$iFlag) correctly Line $File_CopyHandle = DllCall($iDll,"DWORD","File_Copy","wstr",$SourceFile,"wstr", $DestFile,"DWORD",$BytesNumberAtaTime,"DWORD",$iFlag) And another mistake in the same function in ThredLibrary Code mistakes Has been modified New Script Thre