Control Parameters

Environment software performs standard routines used by application programs. If you access application programs through the Lawson Interface Desktop (LID), the Environment software involved is lapm (Lawson Presentation Manager). If you access application programs through Lawson Portal, the Environment software involved is the IOS programs. Environment software performs many procedures, eliminating the need to code them, such as

• editing and formatting form fields

• form transfers

• formatting report fields

• processing error messages

Two control parameters, E@CONTROL and E@SCREENDATA, are passed between the user interface and either lapm or the IOS programs (depending on the user interface). These control parameters enable the user interface to communicate with the Lawson applications through either lapm or the IOS programs.

The E@CONTROL control parameter includes what functions the application program needs from Environment programs and lets the application program know what to do next as a result of completing the requested functions.

The E@SCREENDATA contains presentation data (screens and reports). That is, it contains the changing image of the screen or report as phases of the application program process progress.