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High-Level Language Application Programming Interface
4-1
Chapter 4. High-Level Language Application
Programming Interface
The Host Connection Program (HCON) emulates a 3278/79 display or a 3286/87 printer
attached to a System/370 mainframe host. This chapter provides information for using the
High-Level Language Application Programming Interface (HLLAPI) and HLLAPI functions to
provide an interface to the Host Connection Program.
Programming HLLAPI
The High-Level Language Application Programming Interface (HLLAPI) is an application
programming interface (API) supported by the AIX 3270 Host Connection Program
(HCON). This interface enables a program on a workstation to access a host presentation
space. A host presentation space is a region in computer memory that can be displayed on
the screen of a 3270 terminal emulator.
Consult the following for more information about HLLAPI:
• HLLAPI for AIX 3270 Host Connection
• Programming with HLLAPI (on page 4-7)
• HLLAPI Functions by Function Number (on page 4-9).
HLLAPI for AIX 3270 Host Connection
The High-Level Language Application Programming Interface is an API supported by
HCON. This interface allows workstations to interact with a host using 3270 terminal
emulation. Consult the following for more information about the High-Level Language
Application Programming Interface:
• HLLAPI Execution Environment on page 4-1.
• HLLAPI Components on page 4-3.
• Uses of HLLAPI on page 4-4.
• HLLAPI Services on page 4-4.
• HLLAPI Connections on page 4-5.
• HLLAPI Presentation Spaces on page 4-5.
• Printer Sessions on page 4-5.
• Running HLLAPI Programs on page 4-5.
• HLLAPI Current Connection on page 4-5.
• Keyboard Remap with Utility Session on page 4-6.
• Ending HLLAPI Communication on page 4-6.
HLLAPI Execution Environment
The HLLAPI application executes in a process environment. When you run the HLLAPI
application, the following processes are generated:
Name Description
hcondmn Daemon process
e789x Emulator child process for each session as initiated by the HLLAPI
program
- Bull DPX/20 1
- About This Book 5
- Ordering Publications 6
- Contents 7
- HCON Capabilities 18
- National Language Support 19
- Machine Requirements 20
- Connection Requirements 21
- Programming Requirements 22
- Limitations 23
- Using Host Connection Program 25
- Display Sessions 27
- Session Profiles 28
- Xwindow 3270 Emulator (xhcon) 31
- Mouse Function 32
- XDesktop Startup 33
- Window Characteristics 34
- 3270 Emulator 37
- 3270 Keyboard 38
- Using Default 3270 Keyboards 50
- Keyboards 54
- Function PressFunctionPress 63
- PF12 F12 ATTN Ctrl-A 63
- CURSEL Ctrl-L 63
- HCON Utility Program Overview 64
- Utility Program Keys 67
- Utility Program Fields 68
- Message Field 69
- Heading Field 69
- 3270 Fields 71
- Displayable 3270 Attributes 72
- Key Definition Fields 76
- Changing Key Definitions 76
- Redefining Keyboard Values 77
- Changing the Key Map Fields 77
- HCON File Transfers 79
- Session Profile Prompt Screen 82
- Restart Menu 82
- CMS Menu 83
- TSO Menu 84
- File Transfer Message Window 87
- Toggle Fields 88
- Edit Fields 89
- HCON Host Logon Procedures 91
- Example AUTOLOG Script 94
- Using an HCON AUTOLOG Script 95
- Logon and Logoff Screens 97
- Logon and Logoff Fields 99
- HCON Commands 101
- Working with Session Profiles 102
- Working with HCON Sessions 102
- Managing HCON 103
- HCON Users 104
- Managing HCON Sessions 105
- Storing HCON Session Profiles 106
- HCON Display Emulation 107
- 3270 Data Stream Commands 108
- 3270 Data Stream Orders 110
- HCON Printer Emulation 121
- 3270 Printer Data Stream 122
- SCS Printer Data Stream 122
- SCS Structured Fields 123
- HCON Processes 125
- HCON File Transfer Process 128
- Prerequisite 130
- Bypassing the Password Prompt 131
- HCON Connections and Adapters 133
- HCON Attachments 135
- Unit Attachment 136
- 3172/8232 Attachment 137
- Channel Attachment 137
- SNA Standalone Attachment 138
- SNA Support 141
- Prerequisites 143
- Procedure 143
- HCON Display Session Pooling 144
- HIA Pooling 145
- SNA Node T2.1 Pooling 145
- HCON Screen Size Management 148
- Installing and Updating HCON 150
- Adapters Supported by HCON 151
- Configuring HCON 155
- HCON and terminfo Key Names 156
- Setting the Terminal Type 158
- Maintaining HCON 161
- Troubleshooting HCON 162
- 084B0000 Sense Code Received 164
- Host Data Rejected 165
- SNA Node T2.1 Sense Codes 166
- Configuring Hosts for HCON 168
- 3274/3174 Control Unit 169
- Token-Ring Attachment Example 177
- Reading the Error Message 178
- Error Message 179
- Programming Interface 201
- HLLAPI Components 203
- Uses of HLLAPI 204
- HLLAPI Services 204
- HLLAPI Connections 205
- HLLAPI Presentation Spaces 205
- Printer Sessions 205
- Running HLLAPI Programs 205
- HLLAPI Current Connection 205
- Ending HLLAPI Communication 206
- Programming with HLLAPI 207
- Compiling and Linking 208
- Source Code Preparation 208
- HLLAPI Functional Call Syntax 208
- Prerequisite Calls 211
- Supplied Parameters 211
- Returned Parameters 211
- COPY FIELD TO STRING (34) 215
- DBCS Remarks 216
- COPY OIA (13) 217
- COPY PRESENTATION SPACE (5) 223
- Related Information 229
- COPY STRING TO FIELD (33) 230
- Additional DBCS Remarks 231
- FIND FIELD LENGTH (32) 235
- FIND FIELD POSITION (31) 237
- GET KEY (51) 239
- PAUSE (18) 242
- POST INTERCEPT STATUS (52) 244
- QUERY CURSOR LOCATION (7) 246
- QUERY FIELD ATTRIBUTE (14) 247
- QUERY HOST UPDATE (24) 249
- QUERY SESSIONS (10) 250
- QUERY SESSION STATUS (22) 252
- QUERY SYSTEM (20) 254
- RECEIVE FILE (91) 255
- RELEASE (12) 257
- RESERVE (11) 258
- RESET SYSTEM (21) 259
- SEARCH FIELD (30) 260
- SEND FILE (90) 264
- SEND KEY (3) 267
- Keyboard Mnemonics 268
- SET CURSOR (40) 272
- SET SESSION PARAMETERS (9) 273
- Session Options 274
- START HOST NOTIFICATION (23) 279
- Returned Parmeters 281
- STOP HOST NOTIFICATION (25) 283
- STOP KEYSTROKE INTERCEPT (53) 284
- WAIT (4) 285
- Sample C HLLAPI Program 287
- Programming HCON 299
- Security 300
- HCON Programming Examples 301
- Compiling Example Programs 302
- HCON Programming References 309
- Return Codes Overview 311
- File Transfer Error Codes 313
- HLLAPI Return Codes 315
- NOM / NAME : Date : 329
- SOCIETE / COMPANY : 329
- ADRESSE / ADDRESS : 329
- 86 A2 74WG 02 332
- ORDER REFERENCE 332
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