Methods and apparatus for a selectable backdrop

Details Methods and apparatus for a selectable backdrop Methods and apparatus for a selectable backdrop

1995-08-07

1997-05-27

Bayerl, Raymond J.

395333, 395653, G06F 300

Patent

active

056341024

ABSTRACT:
A method, in a digital computer having a display screen, for executing an application program in a backdrop mode that makes the application program non-removable from the display screen. The method includes the steps of designating the application program for execution in the backdrop mode and executing the application program. Further, the method includes the step of intercepting, using substitute subroutines external to the application program, selected data destined for the application program. The interception advantageously prevents the application program from responding to the selected data in a manner normally expected of the application program if the application program executes in a non-backdrop mode. The selected data that is intercepted includes data for causing the application program to quit execution. Further, the method also includes the step of disabling a close option in the display screen to prevent a user of the digital computer from issuing a command to quit execution of the application program while the application program executes in the backdrop mode. In this manner, the method permits codes in the application program to remain substantially unchanged irrespective of whether the application program executes in the non-backdrop mode or in the backdrop mode.

REFERENCES:
patent: 5530795 (1996-06-01), Wan
patent: 5530858 (1996-06-01), Stanley et al.
patent: 5551033 (1996-08-01), Foster et al.

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