Character positions within the 3270/5250 buffer are addressed by row and column. For the default Mod 2 3270 emulator screen, row numbers range from 1 to 24, from top to bottom; column numbers range from 1 to 80, from left to right. Other screen models have different dimensions. The following examples illustrate how a character position is expressed as an ordered pair of numbers for Mod 2 of a 3270 Emulator Screen:

[1,2] = row 1, column 2 

[24,80] = row 24, column 80 

For 5250 only, sometimes a host message is temporarily displayed on the 25th row, which is normally where the Operator Information Area is displayed. In this situation, row numbers range from 1 to 25. ( See EcsReadLine in Part II.)

In other situations, characters within the 3270/5250 Operator Information Area (the bottom line of the host system when there is no message being displayed) cannot be accessed directly.

•For 5250 sessions, see EcsCheckIndicator.

•For 3270 sessions, see EcsGetSessionStatus.