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GetBoundsRect info  Overview  Group

The GetBoundsRect function obtains the current accumulated bounding rectangle for a specified device context.

Windows maintains an accumulated bounding rectangle for each application. An application can retrieve and set this rectangle.

UINT GetBoundsRect(

    HDC hdc,

// handle to device context of interest

    LPRECT lprcBounds,

// points to structure to receive bounding rectangle

    UINT flags 

// specifies function options

   );

Parameters

hdc
Identifies the device context whose bounding rectangle the function will return.
lprcBounds
Points to the RECT structure that will receive the current bounding rectangle. The application’s rectangle is returned in logical coordinates, and the Windows rectangle is returned in screen coordinates.
flags
Specifies aspects of how the GetBoundsRect function will operate on a given call. This parameter can be the following value:

Value

Meaning

DCB_RESET

Clears the bounding rectangle after returning it. If this flag is not set, the bounding rectangle will not be cleared.

Return Values

The return value specifies the state of the accumulated bounding rectangle; it can be one of the following values:

Value

Meaning

0

An error occurred. The given device context handle is invalid.

DCB_DISABLE

Boundary accumulation is off.

DCB_ENABLE

Boundary accumulation is on.

DCB_RESET

The bounding rectangle is empty.

DCB_SET

The bounding rectangle is not empty.

Remarks

The DCB_SET value is a combination of the bit values DCB_ACCUMULATE and DCB_RESET. Applications that check the DCB_RESET bit to determine whether the bounding rectangle is empty must also check the DCB_ACCUMULATE bit. The bounding rectangle is empty only if the DCB_RESET bit is 1 and the DCB_ACCUMULATE bit is 0.

See Also

SetBoundsRect 


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