Changing the colour of pixels in an image.

[JohnOne]

Hoping to be able to use .bmp image. I'm taking a screenshot of a region of screen.

The image I want is circular, which means the four corners of the shot have different colours.

For example the circle is blue, and the background is of varying colours and shades.

So I'd like to be able to change the offending corner pixels to blue before saving to disk.

The positions of the offending pixels in the shots will always be constant.

I'm guessing I'll need the voodoo of GDI to go about this but I have no Idea where to start, so any pointers are very welcome and much appreciated.

Edited April 19, 2012 by JohnOne

[JohnOne]

Never mind, I think I've got it.

I mean not wrote the code yet, but got it in my head, just so you don't waste your time.

Thanks for looking.

[JohnOne]

I take it back, I had it in my head that I could

$hBitmap = _ScreenCapture_Capture("",$Left,$Top,$Right,$Bottom,False)

But it seems that function only return a bitmap object if

$hBitmap = _ScreenCapture_Capture("")

So still looking for a starting point.

[JohnOne]

Shameless bump, I'm having serious search problems.