point within hexagon?

oops, my bad, try this one, and I have no idea why you would want to use floats when using integer based pixel positions:

Function dot(x0,y0,x1,y1,x2,y2)
	Return (x1-x0)*(y2-y1)-(x2-x1)*(y1-y0)
End Function

Function InsideHexagon(px,py,x0,y0,x1,y1,x2,y2,x3,y3,x4,y4,x5,y5)
	If dot(x0,y0,x1,y1,px,py)>0
		If dot(x1,y1,x2,y2,px,py)>0
			If dot(x2,y2,x3,y3,px,py)>0
				If dot(x3,y3,x4,y4,px,py)>0
					If dot(x4,y4,x5,y5,px,py)>0
						If dot(x5,y5,x0,y0,px,py)>0
							Return True
						EndIf
					EndIf
				EndIf
			EndIf
		EndIf
	EndIf
End Function