hdc (HDC) - input

Device context handle.

flModel (LONG) - input

Model flags.

These flags determine how polygons are drawn:

POLYGON_INCL

Default setting. Fill is inclusive of bottom right.
POLYGON_EXCL
Fill is exclusive of bottom right. Aids migration from other graphics models.

flOptions (ULONG) - input

Option flags.

These flags determine how the polygons are filled:

POLYGON_ALTERNATE

Fill is performed by using the alternate mode.
POLYGON_WINDING
Fill is performed by using the winding mode.
POLYGON_BOUNDARY
Draw boundary lines.
POLYGON_NOBOUNDARY
Do not draw boundary lines.

paPolygon (PPOLYGON) - input

Pointer to an array of POLYGON structures:

ulPoints

Number of points in this polygon
aPointl
Array of points defining polygon
If COM_TRANSFORM is not set, the function expects the points to be in screen coordinates.

cPolygons (LONG) - input

Number of POLYGON structures.

When this is passed as 0, no action is taken except to return Successful.

pInstance (PVOID) - input

Pointer to instance data.

lFunction (ULONG) - input

High-order WORD=flags; low-order WORD = NGrePolygonSet.

rc (LONG) - returns

Return codes.

This function returns an integer (cHits) indicating, where appropriate, whether correlation hits were detected:

GPI_OK

Successful
GPI_HITS
Successful with correlate hit (returned by display drivers when the correlate flag is ON, and a hit is detected)
GPI_ERROR
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_COORDINATE_OVERFLOW PMERR_INV_IN_AREA
PMERR_INV_IN_PATH

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

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