Vcl.Graphics.TCanvas.HandleAllocated
Delphi
function HandleAllocated: Boolean;
C++
bool __fastcall HandleAllocated(void);
Properties
Type | Visibility | Source | Unit | Parent |
---|---|---|---|---|
function | public | Vcl.Graphics.pas Vcl.Graphics.hpp |
Vcl.Graphics | TCanvas |
Description
Indicates whether the TCanvas object has acquired a handle to a device context.
Use HandleAllocated to determine whether the Handle property is set to an HDC value. HandleAllocated indicates whether the canvas has acquired a device context. Use HandleAllocated rather than reading the Handle property. When an application reads the Handle property, TCanvas automatically allocates a new device context and returns its handle if the property had not been previously set.