Convert (Vb6 style) long rgb value to something useful in vb.net

[nemaroller]

Really, this should be simple...

In VB6, you could represent colors using a long data type for the 64,000+ possible colors.....

So if I have a data item (myMapLine(i).Colour) that holds a line's color using a long between 0 and 64,000, how the heck do I assign that in VB.net?

myPen = New Pen(Color.FromArgb(myMapLine(i).colour), myMapLine(i).thickness)

That doesn't work... nothing appears at all....

[Bananafish]

Try making the RGB value negative,

ie

dim intColor as int32
 
intColor = myMapLine(i).Colour  * -1
myPen = New Pen(Color.FromArgb(intColor), myMapLine(i).thickness)

[Frans C]

Originally posted by nemaroller

myPen = New Pen(Color.FromArgb(myMapLine(i).colour), myMapLine(i).thickness)

That doesn't work... nothing appears at all....

I struggled with this as well. The problem is the difference between RGB and ARGB, where a is the alpha blending part. Because this is 0 in RGB, the color is completely transparent, so in fact it is invisible.

Try something like this:

myPen = New Pen(Color.FromArgb(myMapLine(i).colour OR &HFF000000), myMapLine(i).thickness)

[nemaroller]

Thanks for the replies, at least something is drawing on the screen now, the first solution appears closer to the colors that resulted from the vb6 version, but they seem washed...

The second solution changed the basic hue from red/orange to bluish....

[Frans C]

You could try if the ColorTranslator.FromOle yields better results.