This is the legacy 4D documentation web site. Documentations are progressively being moved to developer.4d.com
- 4D Language Reference
-
- List of constant themes
-
-
4D Environment
-
4D Write Pro
-
ASCII Codes
-
Backup and Restore
-
BLOB
-
Cache Management
-
Colors
-
Communications
-
Compression
-
Data File Maintenance
-
Database Engine
-
Database Events
-
Database Parameters
-
DataStore Request Log
-
Date Display Formats
-
Days and Months
-
Design Object Access
-
Dictionaries
-
Digest Type
-
Error Handler
-
Euro Currencies
-
Events (Modifiers)
-
Events (What)
-
Export Structure
-
Expressions
-
Field and Variable Types
-
File and Folder
-
Find Window
-
Font Styles
-
Font Type List
-
Form Area
-
Form Events
-
Form Object Types
-
Form Objects (Access)
-
Form Objects (Properties)
-
Form Parameters
-
Formulas
-
Function Keys
-
Graph Parameters
-
Hierarchical Lists
-
HTTP Client
-
Index Type
-
Is License Available
-
ISO Latin Character Entities
-
LDAP
-
List Box
-
Listbox Footer Calculation
-
Log Events
-
Mail
-
Math
-
Menu Item Properties
-
Multistyle Text
-
Multistyle Text Attributes
-
Objects and collections
-
Open Form Window
-
Open Window
-
Pasteboard
-
PHP
-
Picture Compression
-
Picture Display Formats
-
Picture Metadata Names
-
Picture Metadata Values
-
Picture Transformation
-
Platform Interface
-
Platform Properties
-
Print Options
-
Process State
-
Process Type
-
QR Area Properties
-
QR Borders
-
QR Commands
-
QR Document Properties
-
QR Operators
-
QR Output Destination
-
QR Report Types
-
QR Rows for Properties
-
QR Text Properties
-
Queries
-
Relations
-
Resources Properties
-
SCREEN DEPTH
-
SET RGB COLORS
-
Shortcut and Associated Keys
-
SQL
-
Standard Action
-
Standard System Signatures
-
Strings
-
System Documents
-
System Folder
-
System Format
-
TCP Port Numbers
-
Time Display Formats
-
Trigger Events
-
Value for Associated Standard Action
-
Web Area
-
Web Server
-
Web Services (Client)
-
Web Services (Server)
-
Windows
-
XML
-
Database Events
| Constant | Type | Value | Comment |
| On after host database exit | Longint | 4 | The On Exit database method of the host database has just finished running |
| On after host database startup | Longint | 2 | The On Startup database method of the host database just finished running |
| On application background move | Longint | 1 | The 4D application moves to the background |
| On application foreground move | Longint | 2 | The 4D application moves to the foreground |
| On before host database exit | Longint | 3 | The host database is closing. The On Exit database method of the host database has not yet been called. |
| On before host database startup | Longint | 1 | The host database has just been started. The On Startup database method method of the host database has not yet been called. |
On Host Database Event database method
On System Event database method
Product: 4D
Theme: List of constant themes
4D Language Reference ( 4D v20 R7)
