[DUG] Windows System Colour

[Edward Huang]

Hi,

As far as I know, these system colours can be different depends on Windows
themes, and "anyone" can change them in Windows. So clBtnFace in one machine
has no guarantee to be the same to another machine.  There's API to find out
real colour for each system colour, although I can't remember on top of my
head.

Cheers,

Edward
  -----Original Message-----
  From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz]On
Behalf Of Robert martin
  Sent: Friday, 20 March 2009 16:45
  To: rohit at cfl.co.nz; NZ Borland Developers Group - Delphi List
  Subject: Re: [DUG] Windows System Colour


  Hi Rohit

  I suspect the issue is how you are replacing the pixel.  I'm no expert in
this but some of the painting / drawing routines do XORs etc of the new and
old colour depending on the API and parmters set.  I would check there
first.

  Hope that is some help.

  Cheers
  Rob


  Robert Martin

  Software development manager



  Chreos

  www.chreos.co.nz

  Ph +64 03 377-0495









  Rohit Gupta wrote:
    I am a little puzzled.  I know that the system colours such as clBtnFace
are special constants.  In one part of the app, when I replace a pixel in a
bitmap to clBtnFace it goes gray like it should.  In another part of the app
it goes money-greeny.  Both do it consustently.

    Any clues ?  Do I need to convert these special colours to real colours
?  I couldn't find any function to do it.




    --
    Regards

    Rohit Gupta
    B.E. Elec., M.E., Mem IEEE, Member IET
    Technical Manager
    Computer Fanatics Ltd

    Tel 4892280
    Fax 4892290
    Web www.cfl.co.nz

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