See Also
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This function retrieves a handle to a display device context (DC) for the client area of the specified window. The display device context can be used in subsequent graphics display interface (GDI) functions to draw in the client area of the window.
Syntax
HDC GetDC( HWND hWnd ); |
Parameters
- hWnd
-
Handle to the window whose device context is to be retrieved. If this value is NULL, GetDCretrieves the device context for the entire screen.
Return Value
The handle the device context for the specified window's client area indicates success. NULL indicates failure.
To get extended error information, call GetLastError.
Remarks
The GetDCfunction retrieves a common, class, or private device context depending on the class style specified for the specified window.
For common device contexts, GetDCassigns default attributes to the device context each time it is retrieved.
For class and private device contexts, GetDCleaves the previously assigned attributes unchanged.
After painting with a common device context, the ReleaseDCfunction must be called to release the device context.
Class and private device contexts do not have to be released.
The number of device contexts is limited only by available memory.
Requirements
| Header | winuser.h |
| Library | coredll.lib, Winmgr.lib |
| Windows Embedded CE | Windows CE 1.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
See Also
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