Q57342: Light Pens Tested with Microsoft BASIC
Article: Q57342 Product(s): See article Version(s): 4.50 Operating System(s): MS-DOS Keyword(s): ENDUSER | SR# S891206-121 B_BasicCom | mspl13_basic Last Modified: 22-JAN-1990 The following light pens by the LightPen Company were tested with QuickBASIC Version 4.50, Microsoft BASIC Compiler Versions 6.00 and 6.00b, and Microsoft BASIC Professional Development System (PDS) Version 7.00: 1. Light Pen 2. Soft Pen The following code example is from Page 315 of the "Microsoft QuickBASIC 4.0: BASIC Language Reference" manual under the example for the PEN function. This code example was used to test the light pen. If you do not have a light pen, pushing both buttons on the mouse at the same time simulates a light pen being on. The code produces an endless loop to give the current position and status of the pen. Compile and link with the following command lines: BC test.bas; LINK test.obj,,,BRUNxx.Lib; Code Example ------------ CLS PEN ON DO p = PEN(3) LOCATE 1,1: PRINT "Pen Is "; IF p THEN PRINT "down" ELSE PRINT "up" x = PEN (4) : y = PEN(5) PRINT "x=" x, "y=" y LOOP
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