PENDATAHEADER - Microsoft Windows Pen API Programmer's Reference

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PENDATAHEADER

0 2.0

Main header of an HPENDATA memory block.

typedef struct {

UINT wVersion;

UINT cbSizeUsed;

UINT cStrokes;

UINT cPnt;

UINT cPntStrokeMax;

RECT rectBound;

UINT wPndts;

int nInkWidth;

DWORD rgbInk;

} PENDATAHEADER;

Members
wVersion

Pen data format version. Same as the version number for the Pen API, which is currently 0x0002. Calling GetPenDataAttributes with the GPA_VERSION argument retrieves the value of wVersion.

cbSizeUsed

Size (in bytes) of pen data memory block.

cStrokes

Number of strokes in the block. (Each pen-down and pen-up sequence counts as a single stroke.)

cPnt

Count of all points in the block. Calling GetPenDataAttributes with the GPA_POINTS argument retrieves the value of cPnt.

cPntStrokeMax

Length (in points) of longest stroke. Calling GetPenDataAttributes with the GPA_MAXLEN argument retrieves the value of cPntStrokeMax.

rectBound

Bounding rectangle of all pen-down points.

wPndts

Data scaling metric value, expressed as a bitwise-OR combination of PDTS_ values.

nInkWidth

Ink width, in pixels.

rgbInk

Ink color.

Comments
The PENDATAHEADER structure describes the contents of an HPENDATA memory block. Use the GetPenDataInfo or GetPenDataAttributes function to retrieve information from a PENDATAHEADER structure.

For a description of the HPENDATA memory block, see "The HPENDATA Object" in Chapter 4, "The Inking Process."

For a list of data scaling values, refer to the entry for PDTS_ values in Chapter 13, "Pen Application Programming Interface Constants."

See Also
GetPenDataInfo, GetPenDataAttributes, PDTS_

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