Learn DELPHI-VCL with Real Code Examples
Updated Nov 27, 2025
Installation Setup
Install Delphi IDE
Select VCL components in installer
Configure libraries and paths
Install third-party VCL component packages if needed
Verify compiler and IDE options for target Windows version
Environment Setup
Install Delphi IDE
Configure library paths
Enable third-party VCL packages
Set compiler and target options
Configure debugging and profiling
Config Files
.dpr - project source
.pas - unit files
.dfm - form definitions
.res - resources
.bpl - component packages
Cli Commands
dcc32 - Delphi compiler
bds - IDE launcher
dcu2pas - decompile units
dproj - project configuration
msbuild - automated build
Internationalization
String resources and localization
Unicode support
Regional date/number formatting
Right-to-left layout support
Language-specific resource files
Accessibility
Keyboard navigation
Tab order and shortcuts
Screen-reader compatibility
High-contrast support
Accessible naming for components
Ui Styling
VCL Styles for modern look
Custom painting in OnPaint
Themed controls
Alignment and anchors
Form and component scaling
State Management
Form and component lifecycles
Event handler state
Application global variables
Thread synchronization for UI
Component streaming state
Data Management
Database connections via FireDAC
Data-aware controls
In-memory datasets
CSV, JSON, XML import/export
State persistence via forms and components