Vcl.Controls.TWinControl.GetDeviceContext

• Up to Parent: TWinControl

Delphi

function GetDeviceContext(var WindowHandle: HWND): HDC; overload; override;

C++

virtual HDC __fastcall GetDeviceContext(HWND &WindowHandle)/* overload */;

Properties

Type	Visibility	Source	Unit	Parent
function	protected	Vcl.Controls.pas Vcl.Controls.hpp	Vcl.Controls	TWinControl

Description

Provides access to a device context for the control.

Call GetDeviceContext to obtain a handle to a device context for the control.

GetDeviceContext calls the Windows API function GetDC, passing the windowed control's Handle property. It returns the window's handle in the WindowHandle parameter and the HDC as the return value. If the call is unsuccessful, the EOutOfResources exception is raised.

See Also

• EOutOfResources

• Handle

Code Examples

• GetDeviceContext (Delphi)
• GetDeviceContext (C++)