## Presentation Device Driver Reference for OS/2

[prev][next][parent][TOC]

### GreModifyPath - Parameters

hdc (HDC) - input Device context handle.

idPath (LONG) - input Path ID.

cmdMode (LONG) - input Modify mode.

The only valid flag is:

MPATH_STROKE This replaces the original path (with a path that encloses the shape produced by stroking the original path) using the current geometric wide line attribute. Any open figures within the path are not closed.

The envelope includes the effects of "line joins" and "line ends" according to the current values of these attributes. For example, where a line joins an arc, the common point is handled according to the line join attribute in the current line attribute bundle. (See Line Attributes.) When a figure is closed by using GreCloseFigure, the line join attribute in the current line bundle is applied to the start and end points. The envelope takes account of any crossings. For example, a stroked X does not have a hole in the middle if it is subsequently drawn in Exclusive-OR mode.

pInstance (PVOID) - input Pointer to instance data.

lFunction (ULONG) - input High-order WORD=flags; low-order WORD= NGreModifyPath.

fSuccess (BOOL) - returns Return codes.

This function returns BOOLEAN (fSuccess).

TRUE Successful
FALSE Error

Possible Errors Detected: When an error is detected, the handling routine must call WinSetErrorInfo to post the condition. Error codes for conditions that the handling routine is expected to check include:

PMERR_BASE_ERROR
PMERR_BITMAP_NOT_SELECTED
PMERR_COORDINATE_OVERFLOW
PMERR_DEV_FUNC_NOT_INSTALLED
PMERR_HDC_BUSY
PMERR_HRGN_BUSY
PMERR_INSUFFICIENT_MEMORY
PMERR_INV_COLOR_DATA
PMERR_INV_COLOR_INDEX
PMERR_INV_COORD_SPACE
PMERR_INV_COORDINATE
PMERR_INV_FILL_PATH_OPTIONS
PMERR_INV_HDC
PMERR_INV_HRGN
PMERR_INV_IN_AREA
PMERR_INV_IN_PATH
PMERR_INV_LENGTH_OR_COUNT
PMERR_INV_MATRIX_ELEMENT
PMERR_INV_MODIFY_PATH_MODE
PMERR_INV_PATH_ID
PMERR_INV_PATTERN_REF_PT_ATTR
PMERR_INV_PICK_APERTURE_POSN
PMERR_INV_RECT
PMERR_INV_REGION_CONTROL
PMERR_INV_TRANSFORM_TYPE
PMERR_PATH_LIMIT_EXCEEDED
PMERR_PATH_UNKNOWN
PMERR_REGION_IS_CLIP_REGION

Refer to the "Error Explanations" section in the Presentation Manager Programming Reference for further explanation.