ReleaseDC - Win32 Programmer's Reference

Win32 Programmer's Reference

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Windows NT
Yes
Win95
Yes
Win32s
Yes
Import Library
user32.lib
Header File
winuser.h
Unicode
No
Platform Notes
None

ReleaseDC

The ReleaseDC function releases a device context (DC), freeing it for use by other applications. The effect of the ReleaseDC function depends on the type of device context. It frees only common and window device contexts. It has no effect on class or private device contexts.

int ReleaseDC(

HWND hWnd,	// handle of window
HDC hDC	// handle of device context
);

Parameters
hWnd

Identifies the window whose device context is to be released.

hDC

Identifies the device context to be released.

Return Values
The return value specifies whether the device context is released. If the device context is released, the return value is 1.

If the device context is not released, the return value is zero.

Remarks
The application must call the ReleaseDC function for each call to the GetWindowDC function and for each call to the GetDC function that retrieves a common device context.

An application cannot use the ReleaseDC function to release a device context that was created by calling the CreateDC function; instead, it must use the DeleteDC function.

See Also
CreateDC, DeleteDC, GetDC, GetWindowDC

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