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GetPenDataAttributes
- 0
Retrieves information about an HPENDATA object.
int GetPenDataAttributes( HPENDATA hpndt, LPVOID lpvBuffer, UINT uOption )
Parameters
hpndt
Handle to the HPENDATA object.
lpvBuffer
Pointer to a structure whose type depends on uOption, or NULL if the uOption parameter does not require this buffer.
uOption
Specifies the attributes to retrieve. This parameter can be one of the
following:
Constant
| Description
| GPA_MAXLEN
| Retrieves the length (in points) of the longest stroke. lpvBuffer is unused and ignored.
| GPA_POINTS
| Retrieves the total number of points. lpvBuffer is unused and ignored.
| GPA_PDTS
| Retrieves the PDTS_ bits. lpvBuffer is unused and ignored.
| GPA_RATE
| Retrieves the sampling rate in samples per second. lpvBuffer is unused and ignored.
| GPA_RECTBOUND
| Retrieves the bounding rectangle of all pen-down points. lpvBuffer is the address of a RECT structure.
| GPA_RECTBOUNDINK
| Like GPA_RECTBOUND, retrieves the bounding rectangle of all pen-down points,
but inflates the rectangle to accommodate ink width. lpvBuffer is the address of a RECT structure.
| GPA_SIZE
| Retrieves the size of the pen data memory block in bytes. Because of the
potential large size of this value, the return value of the function is not used.
Instead, lpvBuffer is the address of a DWORD variable to fill with the size.
| GPA_STROKES
| Retrieves the total number of strokes, including pen-up strokes. lpvBuffer is unused and ignored.
| GPA_TIME
| Retrieves the absolute time of creation of the pen data. lpvBuffer is the address of an ABSTIME structure.
| GPA_USER
| Retrieves the number of user bytes available per stroke: 0, 1, 2, or 4. lpvBuffer is unused and ignored.
| GPA_VERSION
| Retrieves the version number of the pen data. lpvBuffer is unused and ignored.
|
Return Value
Returns PDR_OK or an integer value if successful, depending on the uOption parameter.
Comments
GetPenDataAttributes provides enhancements of some of the capabilities of GetPenDataInfo. It also provides additional detailed information taken from the HPENDATA block.
See Also
GetStrokeAttributes, GetPenDataInfo
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