GetPolyFillMode Function

Declare Function GetPolyFillMode Lib "gdi32.dll" (ByVal hdc As Long) As Long

Platforms: Win 32s, Win 95/98, Win NT

GetPolyFillMode determines how a given device fills polygonal areas and shapes. These two modes only differ in how they handle complex overlapping polygons (i.e., polygons whose boundaries criss-cross themselves). The function returns 0 if an error occured, or exactly one of the following flags if successful:

ALTERNATE = 1

The device alternates between filling and not filling contiguous sections whose boundaries are determined by the edge(s) of the polygon crossing through the polygon's interior.

WINDING = 2

Any section inside the polygon is filled, regardless of any intra-polygonal boundaries and edges.

hdc

A device context to the device to find the polygon filling mode of.

Example:

' Display the current polygon fill mode of window Form1.
Dim fillmode As Long  ' receives fill mode

fillmode = GetPolyFillMode(Form1.hDC)  ' get the polygon fill mode
If fillmode = ALTERNATE Then
  Debug.Print "Form1 currently uses alternating filling."
Else
  Debug.Print "Form1 currently uses winding filling."
End If

Related Call: SetPolyFillMode
Category: Regions
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