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 |
); |
Value |
Meaning |
DCB_RESET |
Clears the bounding rectangle after returning it. If this flag is not set, the bounding rectangle will not be cleared. |
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. |
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.
file: /Techref/os/win/api/win32/func/src/f27_11.htm, 4KB, , updated: 2000/4/7 12:19, local time: 2024/9/1 11:48,
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