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System and method of integrating a spreadsheet and external program having output data calculated automatically in response to input data from the spreadsheet

  • US 5,893,123 A
  • Filed: 06/22/1995
  • Issued: 04/06/1999
  • Est. Priority Date: 06/22/1995
  • Status: Expired due to Fees
First Claim
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1. A system for integrating a spreadsheet program and an external program comprising:

  • an input cell in said spreadsheet, said input cell containing data used as input by said external program;

    a transmission function containing a reference to said input cell, such that said spreadsheet automatically schedules evaluation of said transmission function as part of normal spreadsheet operation if said input cell is changed, said transmission function transmitting the data from said input cell to said external program; and

    a retrieval function containing a reference to said transmission function, such that said spreadsheet automatically schedules evaluation of said retrieval function to occur after evaluation of said transmission function, said retrieval function as part of normal spreadsheet operation retrieving output data from said external program, said output data calculated by said external program based upon said input data from said spreadsheet.

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