In DP4 groups of devices can be defined and accessed from a program. Complex devices are defined using DFSETUP. In QA Build, a procedure body is defined to select the current device and subsequent print procedures print to that device. For a full description of the use of groups of devices, please refer to the Device Integration Developers Manual.
When input is returned, the variable ip_source is set to indicate which input subdevice was used. The value of ip_source corresponds to the number of the input subdevice.
| Definition: | ip_source I4 |
| Example: | A credit card number can be input from the magnetic stripe
reader or the keyboard
|
| If input is received from the keyboard the value of ip_source equals 1. If input is received from the magnetic stripe reader, the value of ip_source equals 3 |