Device context (DC) classes

Instead of drawing directly on a device (like the screen or a printer), you can use GDI classes to draw on a bitmap using a device context (DC). More...

Classes
class	owl::TDC
	TDC is the root class for GDI DC wrappers. More...
class	owl::TWindowDC
	Derived from TDC, TWindowDC is a device context (DC) class that provides access to the entire area owned by a window. More...
class	owl::TScreenDC
	Derived from TWindowDC, TScreenDC is a DC class that provides direct access to the screen bitmap. More...
class	owl::TDesktopDC
	A DC class that provides access to the desktop window's client area which is the window behind all other windows. More...
class	owl::TClientDC
	A device context class derived from TWindowDC, TClientDC provides access to the client area owned by a window. More...
class	owl::TNCPaintDC
	A DC class that provides access to the non-client area owned by a window. More...
class	owl::TPaintDC
	A DC class that wraps begin and end paint calls for use in an WM_PAINT response function. More...
class	owl::TMetaFileDC
	A DC class that provides access to a DC with a metafile selected into it for drawing on (into). More...
class	owl::TCreatedDC
	An abstract TDC class, TCreatedDC serves as the base for DCs that are created and deleted. More...
class	owl::TIC
	Derived from TCreatedDC, TIC is a device context (DC) class that provides a constructor for creating a DC object from explicit driver, device, and port names. More...
class	owl::TMemoryDC
	A device context (DC) class derived from TCreatedDC, TMemoryDC provides access to a memory DC. More...
class	owl::TDibDC
	A DC class that provides access to DIBs using DIBSection, WinG, or the DIB.DRV driver. More...
struct	owl::TBandInfo
	Equivalent to BANDINFOSTRUCT. More...
class	owl::TPrintDC
	A DC class that provides access to a printer. More...

Detailed Description

Instead of drawing directly on a device (like the screen or a printer), you can use GDI classes to draw on a bitmap using a device context (DC).

A device context is a structure that contains information about the drawing attributes (pens, brushes, text color, and so on) of a particular device. DC classes support a variety of device context operations.

• TDC is the root class for GDI DC wrapper classes.
• TWindowDC and its derived classes such as TClientDC and TScreenDC provide access to the area owned by a window.
• TCreatedDC and its derived classes provide access to various DCs that are created and deleted such as memory and print DCs.