Capturing Data from Host Screens
A common automation task is to control the way data from host screens appears to the end user. You typically accomplish this by copying selected data from the host screen to your application, and vice versa. This topic describes the Screen object and the key methods used to copy screen information.
Interacting with a host session requires the Screen object that is specific to the type of host you are using:
This Screen object
|
Accesses
|
| ScreenTn3270 |
An IBM mainframe host session. |
| ScreenTn5250 |
An IBM AS/400 host session. |
| ScreenT27 |
A Unisys ClearPath LX, ClearPath NX, or A Series host session. |
| ScreenUts |
A Unisys ClearPath IX or 2200 Series host session. |
| ScreenVt |
A DEC VAX, Linux, or UNIX host session. |
| ScreenAlc |
A Unisys or IBM host session using the Airline Protocol. |
The following Screen object methods are commonly used for copying data between a presentation space and your application:
| Method |
Description |
| putString |
Copies data to a specified position in the host presentation space. |
| getString |
Copies data from a specified position in the host presentation space. |
| sendKeys |
Transmits characters and keystrokes to the host session. |
| waitForCursor, waitForString, and waitHostQuiet |
Pause processing for a specified number of milliseconds until a condition is met. Because of varying host and network speeds, these screen methods help to prevent timing errors. |
