The same icon draws in two DC. One is more brightness than anther.   

Two DC belongs two window.
One of the two DC is a memory DC,and it has an DIB section:
      bmi.bmiHeader.biBitCount = 32;
      bmi.bmiHeader.biCompression = BI_RGB;


so,why?

date: Thu, 24 Jul 2008 14:48:59 +0800   author:   susan none

Re: The same icon draws in two DC. One is more brightness than anther.   

On Jul 24, 7:48 am, "susan" <none> wrote:
> The same icon draws in two DC. One is more brightness than another.
> so,why?

An icon file can contain multiple representations of the same icon,
for different bit depths, sizes etc.  Depending on exactly how you
draw the icon, Windows may be selecting the 'most appropriate' image
for the properties of the DC.  So, not only is is possible for the
brightness to be different, in fact you might get a totally different
image depending on which DC you draw into!

Use an icon editor to view the contents of the icon file; you may find
that different images have different brightness.

Richard.
http://www.rtrussell.co.uk/
To reply by email change 'news' to my forename.

date: Fri, 25 Jul 2008 14:22:16 -0700 (PDT)   author:   unknown