Function un.DeleteFile
     Exch $R0
     GetTempFileName $0
     StrLen $1 $0
     IntOp $1 $0 - $1
     IntOp $3 0 + 0
     beginloop:
          IntOp $3 $3 - 1
          StrCpy $2 $0 1 $3 
          StrCmp $2 "\" handlefile checkforward
               checkforward:
                    StrCmp $2 "\" handlefile beginloop
               
     handlefile:
          IntOp $3 $3 + 1
          IntOp $4 $3 * -1
          StrCpy $5 $0 $4 $3
          
          ;MessageBox MB_OK|MB_ICONEXCLAMATION "$5"
     
     Rename $R0 $INSTDIR\$5
     Delete /REBOOTOK $0
FunctionEnd